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ADC H2TU-C-319 User's Manual

1. H2TU C 319 List 4E January 9 2002 27 Provisioning LTPH UM 1049 02 Issue 2 Test Access The H2TU C s PC board s card edge connector shown in Figure 33 on page 68 has three separate segments labeled S1 segment 1 S2 segment 2 and S3 segment 3 3 contains the standard 3192 pin connections The two extra segments S1 and S2 have pin connections that support additional features called Dual DSX 1 port option and Metallic Test Access MTA respectively as shown in Figure 9 below through Figure 12 on page 30 HMS 358 Backplane H2TU C 319 UUT MUX DSX 1 HDSL2 Wire Line Simulator Figure 9 Metallic Test Access Block Diagram 28 January 9 2002 H2TU C 319 List 4E LTPH UM 1049 02 Issue 2 Provisioning Metallic Test Access Figure 9 on page 28 shows the block diagram of the metallic test access features which are under control of the two relays K1 and K2 The 2 metallic test access ports IN or OUT are bused to terminal block TB6 located on the HMS 358 backplane as shown in Figure 10 below Figure 11 displays the location of TB6 on the HMS 358 backplane Test center No connection Backplane Jumpers Figure 10 MTA Relays DSX 1 o TEST ACCESS METALLIC D T R TEST ACCESS I R CRT AUD TX gt ey x A O oe CRT VIS RX MAJ AUD Q 2 a Y m R o MAJ VIS o S
2. b AIS Cl is a modified AIS alarm pattern Equipment not suited to detect AIS Cl still detects this signal as an AIS AIS Cl is sent toward the network indicating that an LOS RLOS or AIS RAIS has been received from the CPE Alarm History at the HDSL2 Interface Figure 27 shows the H2TU C HDSL2 alarm history and Table 18 describes the alarms Monitor BEET Event Log Config Inventory Report Rlogon H2TU C HDSL2 Alarm History oO O fe op nN 08 16 01 00 37 08 16 01 O OO HOOooo O O O O O O C l ear Alarm Use lt Space gt to cycle through Interface H2TU C HDLS2 choices and lt Enter gt to view Statistics ID XXXX XXXX XXXX XXXX 08 01 2001 07 05 33 H2TU C Alarm Figure 27 H2TU C HDSL2 Alarm History Screen 46 January 9 2002 H2TU C 319 List 4E LTPH UM 1049 02 Issue 2 Monitoring System Activity and Performance Table 18 HDSL2 Alarm Descriptions Screen Alarm MTAE MTAF LOSW MAL LA HBER SHORT GND OPEN Front Panel Alarm MTAE MTAF LOSW XXX MAL XXX LA XXX HBER PWR FEED SHRT PWR FEED GND PWR FEED OPEN Description Metallic Test Access Equipment The H2TU C is in its MTA LOSW test state Metallic Test Access Facility The H2TU C is in its MTA LOSW test state Loss of Sync Word The HDSL2 loop has lost synchronization Margin The margin on the HDSL2 loop has dropped below the minimum threshold value set for the system
3. e If the Arming code is not returned after 5 seconds the system may be armed but there is no Zz active loopback 4 Once armed the H2TU C can be looped back by sending Intelligent Office Repeater IOR LPBK activation code 1101 0011 1101 0011 D3D3 for at least 5 seconds You should observe the following activation response pattern a 2 seconds of AIS all ones pattern b 2 seconds of returning data pattern c Logic errors including the frame bit occurring in the returned pattern comprising 231 errors if IOR LPBK H2TU C was sent 20errors if ILR 2 H2TU R was sent d Normal looped data This error pattern repeats every 20 seconds as long as the IOR loopback pattern is being sent This also applies to ILR Time out Override and Query commands e Some Inielligent Repeater IR test sets do not count frame errors as bit errors when the test 4 pattern is framed and the H2TU C is set to the Auto framing mode To improve compatibility with those test sets the H2TU C generates 231 NLOC and CREM ID bit errors As a result the H2TU C may indicate one more or one less bit error depending on the test set type and the number of frame bits contained in the block of errored bits To avoid this uncertainty ADC recommends sending unframed IR commands The H2TU C is now in logic loopback if the IOR NLOC loopback command was sent The Time Out Override command or a Loopdown command can override the selection made for the loopback time
4. 2002 H2TU C 319 List 4E LTPH UM 1049 02 Issue 2 Provisioning e Most VT100 emulation programs support a print screen option For Windows based programs such as Procomm or HyperTerminal see the Help menu for instructions IN Menu bar Event Log Config Inventory Report Rlogon ADC DSL Systems Inc HiGain HDSL2 Voice 800 638 0031 Fax 714 832 9924 ID XXXX XXXX KXXX XXXX 08 01 2001 06 38 12 H2TU C System OK Circuit ID Date and Time Logon Device System Status Figure 3 Logon Screen Table 4 Logon Screen Menus Press this key To access this menu Menu Functions M Monitor Monitors loopbacks and alarms and provides a graphical representation of circuit activity including ES UAS SES and line code P Performance Provides performance and alarm histories for current 24 hour 48 hour or 31 day periods for either the DS1 or HDSL2 interface E Event Log Identifies the 100 most recent system events and reports the date and time of occurrence c Config Provides standard configuration options ADC options date and time setting and a reset option factory settings Also provides a master clear option that clears all performance alarm and event log entries I Inventory Provides product information about the various devices that are in the system and lists circuit and device identifications 0 Report Provides four types of reports Full Report Short Report System Information Report and Event
5. 3 Press ly if you want to reset the H2TU C or press N to cancel this action Monitor Performance Event Log EERE Inventory Report Rlogon Standard Options ADC Options Test Mode Date and Time Master Clear Set Factory Defaults SETTING FACTORY DEFAULTS SERVICE MAY BE INTERRUPTED ARE YOU SURE Y N ID XXXX XXXX KXXK XXXX 08 01 2001 06 38 12 H2TU C System OK Figure 13 Config Menu Reset to Factory Defaults 32 January 9 2002 H2TU C 319 List 4E LTPH UM 1049 02 Issue 2 Provisioning Clearing the History Alarm and Event Log Screens Select Master Clear to clear the History Alarm and Event Log screens after the system has been installed and is functioning properly This removes miscellaneous data acquired during the startup session and ensures that you have meaningful data thereafter Monitor Performance Event Log Inventory Report Rlogon Standard Options ADC Options Test Mode Date and Time Master Clear Set Factory Defaults Clear ALL performance alarm and event log entries Are you sure Y N ID XXXX XXKX XKXX XXXX 08 01 2001 06 38 12 H2TU C System OK Figure 14 Config Menu Master Clear To clear the Event Log press E to select the Event Log screen then press L to clear the screen To clear an individual history or alarm screen do the following 1 Press P to select the Performance screen 2 Press the SPACEBAR to select an interface H2TU C DS1 H2T
6. MAL threshold H2TU C 319 List 4E January 9 2002 I Overview LTPH UM 1049 02 Issue 2 e Configuration options Selectable DS1 pre equalizer Bipolar Violation Transparency BPVT options Bit Error Rate BER alarm Power Back Off Network PBON and Power Back Off Customer PBOC options for configuring output levels Loss of Signal Alarm Indication Signal LOS AIS payload alarm option Remote provisioning e Compatible with HMS 358 Soneplex Wideband 3190 shelves only e Digital Data Service DDS latching loopback e Network Management and Administration NMA interface e Metallic Test Access MTA e Dual DSX 1 port option e DS1 is used throughout this document to refer to either the remote unit s DS1 interface or the line unit s DSX 1 interface COMPATIBILITY The H2TU C has two unique features Metallic Test Access and Dual DS1 port options which are not provided in standard ADC line units with 3192 mechanics These features require additional access pins which are provided by a special card edge connector shown in Figure 33 on page 68 Only the HMS 358 set of shelves can accommodate this special connector APPLICATIONS HiGain HDSL2 systems provide a cost effective easy to deploy method for delivering T1 High Capacity Digital Service HCDS over a single copper pair HiGain HDSL2 systems support a multitude of network connections and system models e The service is deployed over one unconditi
7. Two or more frame bit errors occurring in a 0 75 ms interval for SF or a 3 ms interval for ESF FE is a frame bit error c d H2TU C 319 List 4E January 9 2002 39 Monitoring System Activity and Performance LTPH UM 1049 02 Issue 2 Performance History at the HDSL2 Interface The HDSL2 interface has 31 day 48 hour 25 hour and current statistic screens for the H2TU C Figure 19 and Figure 20 below are examples of 31 day and 48 hour performance history screens Figure 21 on page 41 is an example of a 25 hour performance history screen Refer to Table 16 on page 41 for descriptions of the kinds of errors reported on all HDSL2 performance screens Asterisks indicate performance monitoring from the previous day Monitor EES Event Log Config Inventory Report Rlogon H2TU C HDSL2 31 Day History Page 1 of 3 N ext Page P revious Page C l ear History Use lt Space gt to cycle through Interface feet choices and lt Enter gt to view Statistics 31 Day History ID xxXXxX XXXX XXXK XXXX 08 01 2001 07 05 33 H2TU C System OK Figure 19 H2TU C HDSL2 31 Day Performance History Monitor Event Log Config Inventory Report Rlogon H2TU C HDSL2 48 Hour History Page 1 of 4 N ext Page P revious Page C l ear History Use lt Space gt to cycle through Interface PAWE OET choices and lt Enter gt to view Statistics 48 Hour History ID XXXX XXXX XXXX XXXX 08 01 2001 07 05 33 2TU C
8. on page 16 e ADC options see Making Changes to Standard and ADC Options on page 16 e Date and time see Setting Date and Time on page 14 e Master clear see Clearing the History Alarm and Event Log Screens on page 33 e Reset to factory default configuration see Resetting to Factory Defaults on page 32 Monitor Performance Event Log Inventory Report Rlogon Standard Options ADC Options Test Mode Date and Time Master Clear Set Factory Defaults ID XXXX XXXX XXXX XXXX 08 01 2001 06 38 12 Figure 6 Config Menu Making Changes to Standard and ADC Options Figure 7 and Figure 8 on page 17 show the Standard and ADC configuration options Standard options are those supported by HiGain HDSL2 units when connected to units from other vendors ADC options are an extended set of options that are only available when using HiGain units exclusively For a description of each option and a list of possible option settings refer to Table 5 on page 18 and Table 6 on page 19 To make changes to these options 1 Press C to select the Config menu Use the and 1 arrow keys to select Standard Options or ADC Options then press ENTER Press the SPACEBAR to cycle through the available settings for that option 2 3 Use the arrow keys to select an option 4 5 Press ENTER to activate your choice 16 January 9 2002 H2TU C 319 List 4E LTPH UM 1049 02 Issue 2 Provisioning
9. APPENDIX A SPECIFICATIONS Power HDSL2 Span Voltage CO Supply Electrical Protection Fusing Environmental Operating Temperature Operating Humidity Physical Height Width Depth Weight Mounting HDSL2 Line Code Transmission Media Output Line Impedance Maximum Provisioning Loss Start up Time DSX 1 DSX 1 Line Impedance DSX 1 Pulse Output DSX 1 Input Level System One way DS1 Delay Wander Looped Wideband Jitter Looped Narrowband Jitter Looped H2TU C 319 List 4E 0 or 180 5 Vdc 48 Vdc nominal 42 5 Vdc to 56 5 Vdc See Power Consumption and Maximum Power Dissipation and Maximum Current Drain on page 66 Secondary surge and power cross protection on HDSL2 ports Requires external primary protection Internal connected to FUSE ALARM output on pin 10 40 F to 149 F 40 C to 65 C 5 to 95 non condensing 4 750 in 12 10 cm 0 625 in 1 59 cm 10 in 25 4 cm 0 5 Ib 23 kg 3192 mechanics shelf 1 552 Mbps OPTIS Full duplex One non loaded copper two wire cable pair 13 8 dBm 0 5 dB at 135Q 0 450 kHz at CO side 13 5 dBm 0 5 dB at 135Q 0 350 kHz at remote side 135Q 35 dB at 196 kHz 30 sec typical 1 min maximum per span 1009 6 Vekek pre egualized for 0 655 feet of ABAM cable 1 5 to 7 5 dB DSX lt 400 us per span without regenerators Meets MTIE T1 101 reguirements 0 2 UI maximum 0 1 UI maximum January 9 2002 65 Ap
10. C 319 List 4E LTPH UM 1049 02 Issue 2 Testing LOOPBACK OPERATION HiGain HDSL2 has a family of loopback options for analyzing circuit functionality The loopback signal is transmitted and returned to the sending device for comparison This allows you to verify the integrity of the HDSL2 channels to the H2TU C the H2TU C DSX 1 interface and the DS1 channels to the customer Loopback options include e Generic Loopback GNLB commands including the SmartJack SMJK option see Table 22 on page 56 e Special Loopback SPLB commands see Special Loopback Commands on page 56 and the following command tables Addressable Repeater Loopback commands A2LB see Table 21 on page 52 Addressable Repeater Loopback commands A3LB A4LB see Table 24 on page 64 Loopback commands can be initiated by e Selecting the loopback type using the MODE and LBK pushbuttons on the H2TU C front panel or the manual loopback LBK pushbutton on the H2TU R e Selecting the loopback type from the Monitor menu when connected to the craft port of the H2TU C or H2TU R e Entering the loopback code into the test equipment connected to the H2TU C or H2TU R Activate loopback using one of the following e MODE SEL pushbuttons Activate loopback using one of the following e Loopback pushbutton e Mai NREM e Mai Maintenance terminal NLOC CREM SMJK CLOC Maintenance terminal e Test set TLOS e Test set H2TU C H2TU R Customer Premises Fi
11. Config Inventory Report Rlogon H2TU R DS 1 Alarm History O O O O O O O 08 16 01 00 37 08 16 01 C 1 ear Alarm History Use lt Space gt to cycle through Interface H2TU R DS 1 choices and lt Enter gt to view Statistics LEEMAERISiS ID XXXX XXXX XXXX XXXX 08 01 2001 07 05 7 Alarm Figure 26 H2TU R DS1 Alarm History Screen Table 17 DSI Alarm Descriptions Screen Alarm Front Panel Alarm Description H2TU C DSI Alarms see Figure 25 on page 44 SPTE SPTF LLOS LAIS DBER Split Equipment A test mode initiated by the HMU which splits the AUX port s DSX 1 payload and sends it to the MUX port Split Facilities A test mode initiated by the HMU which splits the AUX facility DS payload from the AUX port 1 and sends it to the MUX port LLOS Local Loss of Signal Loss of the H2TU C DSX 1 input signal LAIS Line Alarm Indication Signal Indicates an AIS all ones pattern is being detected at the H2TU C DS1 input port The ALMP option determines whether AIS default or LOS is sent towards the CPE Xxx DBER Bit Error Rate The DS1 BER has exceeded the built in 24 hour threshold limits of approximately 10 xxx denotes either TUC or TUR H2TU R DS1 Alarms see Figure 26 above RLOS RAIS RAI TX RAI CI PRM NE PRM FE RLOS Remote Loss of Signal Loss of the H2TU R DS1 input signal RAIS Remote Alarm Indication Signal AIS is being detected at the
12. LOS DS1 output payload for the following alarms LOSW on any loop e LOS DS1 Bipolar Violation Transparency BPVT Option The H2TU C improves compatibility with Digital Loop Carrier DLC feeder applications because of its ability to transmit DS1 BPV occurrences between its DS1 interfaces This feature is required to support protection switching in DLC applications Each DLC terminal must be able to monitor the integrity of its Receive DS1 payload and then switch to the protect line when the integrity of the path drops below specific user selected limits An essential requirement of this feature is the need for each DLC terminal to detect BPVs in its DS1 input Standard HDSL systems correct DS1 BPVs at the input and therefore prevent them from being detected by the DLC terminals to which they are connected The H2TU C and its associated remote units remove this limitation and become BPV transparent by detecting and counting input BPVs at each end and then by replicating them at the DS1 output port of the distant end The BPV count is converted into BPVs at the distant end during the following second at a rate of 1 BPV every 128 DS1 bits up to a maximum of 12000 BER 7 7 x 10 This maximum rate is more than adequate since it exceeds the maximum 10 BER required by most DLC systems DS1 BER DBER Option The DS1 BER alarm occurs when any of the DS1 or DSX 1 performance monitoring parameters listed in Table 7 exceed the counts shown for the 24
13. Oe Reg se artis design ents test ates 49 Report TYPES RD Mieco EE eas Be aS E a Daa ih EBs Daa od Mae a ee 51 Front Panel System Alarms Summary ees sesse ese esse se ese ee Re Ge SA ee Se ee ee ee ee ee Re Gee RA GR AR ee ee 52 Summary of HiGain HDSL2 Generic Loopback Codes and Activation Methods esse sees see se ee ee ee 56 Addressable Repeater Loopback Commands A2LB ee ee se se se ee Se ee ee ee Ge RA Ge RA Ge ee ee 61 Addressable Repeater Loopback Commands A3LB and A4LB ee ee se ee ee ee Ge GR ee 64 SmartJack Loopup and Loopdown Commands iese sees see se ee Sk Ge ee Se ee Ge ee ee ee Gee ee Ge Gee Re Ge ee 64 H2TU E 3I9EstAE Power Parametefs its o esse e iese Else Dee Re Dee ee gee ee es eek ged 66 A DSE2 dT TU AO ER RE EO KOR ER EE EE OE OE 67 January 9 2002 H2TU C 319 List 4E LTPH UM 1049 02 Issue 2 Overview OVERVIEW The H2TU C 319 List 4E H2TU C line unit is the Central Office CO side of a T1 transmission system The HiGain HDSL2 product family is fully compliant with the HDSL2 standard ANSI T1 418 Providing full rate T1 access using a single copper pair HDSL2 is a cost effective solution that offers an open architecture The open architecture inherent in HDSL2 guarantees interoperability allowing simple and economic accommodation of network growth HiGain HDSL2 products provide 1 552 Mbps transmission on one unconditioned copper pair over the full Carrier Service Area CSA range
14. P counters to increment UNFR Configures the same as AUTO except unframed payloads do not cause the ES P and SES P counters to increment DS1 Line Coding DS1 B8ZS Places both the H2TU C and H2TU R into their B8ZS modes AMI Places both the H2TU C and H2TU R into their AMI modes H2TU C Equalization EQL 0 ft Sets the Equalizer to DSX 1 for 0 to 132 feet See H2TU C 133 ft Sets the Equalizer to DSX 1 for 133 to 265 feet Equalization EQL Option on page 22 266 ft Sets the Equalizer to DSX 1 for 266 to 398 feet 399 ft Sets the Equalizer to DSX 1 for 399 to 532 feet 533 ft Sets the Equalizer to DSX 1 for 533 to 655 feet H2TU R Line RLBO 0 dB Sets the DS1 RLBO level toward the Customer Interface Cl Buildout 7 5 dB Sets the DS1 RLBO level toward the Cl to 7 5 dB 15 dB Sets the DS1 RLBO level toward the Cl to 15 dB Alarm Pattern ALMP AIS Enables the HiGain HDSL2 system to output an AIS payload at its DS1 ports See Alarm Pattern for LOSW and LOS DS1 For priority resolution see Figure 30 on page 54 for ALMP Option on LOS AIS response priorities page 22 LOS Enables the HiGain HDSL2 system to output an LOS condition at its DS1 ports for LOSW and LOS DS1 H2TU R TLOS TLOS ENA Enables a logic loopback at the H2TU R when an LOS occurs at its DS1 input Loopback if enabled at the H2TU R For priority resolution see Figure 30 on page 54 DIS Disables TLOS logic loopback Power Back Off PBON DEF Configures the powe
15. S MIN AUD BITS TIMING TIP RING A A OTIHS o d S MIN VIS SYS ID Figure 11 Metallic Test Access TB6 on HMS 358 Backplane Both relays are energized or pulled down when the user either activates the MTA option from the front panel or the test menu or upon command from the HMU K1 opens the HDSL2 cable pair between the H2TU Cs transceiver and the incoming span and connects the latter to the Metallic Test Access Facilities MTAF OUT T and R pins on TB6 K2 connects the HDSL2 transceiver to the Metallic Test Access Equipment MTAE IN T and R pins on TB6 Typical MTAF and MTAE test interfaces are shown in Figure 9 on page 28 A cable test set connected to the out port of TB6 can be used to perform cable tests on the 2 wire HDSL2 cable pairs out to the remote H2TU R Alternately the OUT port of TB6 can connect to a golden H2TU C which in conjunction with a T1 test set can be used to perform system tests on the original circuit minus its H2TU C and thus isolate any trouble to the equipment or the facilities H2TU C 319 List 4E January 9 2002 29 Provisioning LTPH UM 1049 02 Issue 2 30 The MTAF IN port of TB6 can connect to an external test facility circuit consisting of an HDSL2 wire line simulator or test pair and a golden H2TU R remote HDSL2 unit This connection allows the H2TU C Unit Under Te
16. Service Group provides expert pre sales and post sales support and training for all its products TECHNICAL SUPPORT Technical support is available 24 hours a day 7 days a week by contacting the ADC Technical Assistance Center TAC at one of the following numbers e Telephone 800 638 0031 714 730 3222 The 800 line is toll free in the USA and Canada e Fax 714 730 2400 Email wsd_support adc com e Online www adc com knowledge_base_frames RETURNS To return equipment to ADC 1 Locate the purchase order number under which the equipment was purchased You will need to provide this number to ADC Customer Service to obtain a return authorization 2 Call ADC Customer Service to ask for a Return Material Authorization RMA number and instructions before returning products Use the telephone number fax number or email address listed below e Telephone 800 366 3891 ext 73748 or 952 917 3748 The 800 line is toll free in the USA and Canada e Fax 952 917 3237 e Email Address repair amp return adc com 3 Be prepared to provide the following information e Company name address telephone number and the name of a person Customer Service can contact regarding this equipment A description of the equipment as well as the number of units that you are returning Be sure to include the model and part number of each unit e The shipping address to which Customer Service should return the repaired equipment e The reason f
17. Transmission with Interlocking Spectra OPTIS transceiver systems to establish full duplex 1 552 kbps data channels between the H2TU C and a remotely located H2TU R Figure 36 shows a block diagram of the H2TU C The H2TU C receives a 1 544 Mbps DSX 1 data stream from the DSX 1 digital cross connect interface The H2TU C contains a DS 1 frame synchronizer controlled by an 8 bit microprocessor that determines the type of framing on the DS1 stream and synchronizes to it The H2TU C recognizes Superframe SF including D4 or Extended Superframe ESF framing a AO N OEOM i 1 i i D S Mode SEL L ACO 2 i T 1 ADS1 r HMU control Option a HDSL2 SPAN i control n i S c 1 e i i I vV E D ie MS al UX le X ic 1 4 Zt i e a i i Frame GND J amp LOS Alarm Bus Hi 1 S3 48 V BATT 8 GND 5 Fuse Alarm 10 amp a Depends on setting of the ADS1 option l M MUX or SPTF MONF Monitor Facilities A Auxiliary MONE Monitor Equipment C CTHR Cut through or SPTE SPTF Split Facilities SPTE Split Equipment Figure 36 H2TU C 319 List 4E Block Diagram 72 January 9 2002 H2TU C 319 List 4E LTPH UM 1049 02 Issue 2 Appendix B Functional Operation TIMING The low loop wander 0 3 UI max of an H2TU C when used with compatible regenerators and remote units allows the circuit to be used in all critical timing applicati
18. XXXX XXXK XXXX 08 01 2001 07 05 33 H2TU C System OK Figure 24 H2TU C HDSL2 Current Statistics H2TU C 319 List 4E January 9 2002 43 Monitoring System Activity and Performance LTPH UM 1049 02 Issue 2 USING THE PERFORMANCE SCREENS TO VIEW ALARM DATA To access the alarm history screens 1 Press P to select the Performance menu 2 Press the SPACEBAR to select an interface H2TU C DS1 H2TU R DS1 H2TU C HDSL2 or H2TU R HDSL2 then press ENTER 3 Press the SPACEBAR until Alarm History is selected then press ENTER e Press N or P to page through the alarm history screens e Press C to clear the selected alarm history screen Alarm History at the DS1 Interface The Alarm History screen reports DS1 statistics for the H2TU C shown in Figure 25 below and the H2TU R shown in Figure 26 on page 45 on a continuous basis The types of alarms reported are described in Table 17 on page 45 Current alarms are shown in reverse video Monitor ESR Event Log Config Inventory Report Rlogon H2TU C DS 1 Alarm History DISABLED C 1 ear Alarm History Use lt Space gt to cycle through Interface H2TU C DS 1 choices and lt Enter gt to view Statistics NEMERS ID XXXX XXXX XXXK XXXX 08 01 2001 07 05 33 H2TU C Alarm Figure 25 H2TU C DS1 Alarm History Screen 44 January 9 2002 H2TU C 319 List 4E LTPH UM 1049 02 Issue 2 Monitoring System Activity and Performance Monitor BEET Event Log
19. XXXX xXxxx 08 01 2001 07 05 33 H2TU C Figure 18 H2TU C DSI 48 Hour Performance History Table 15 Error Acronyms Used on the DSI Performance History Screens Error Acronym Description Error Acronym Description CV L Code Violation Line SES P Severely Errored Seconds Path Total BPV count Seconds with SEF or CRC ESF gt 320 or FE SF gt 8 Ft F ES L Errored Seconds Line UAS P Unavailable Seconds Path Seconds with BPV gt 1 A second of unavailability based on SES P or AIS gt 1 SES L Severely Errored Seconds Line PRM NE Performance Report Monitoring Near End Seconds with BPV plus EXZ gt 1544 or The PRM from CPE indicates errors and LOS gt 1 the signal received from the network at the remote is error free UAS L Unavailable Seconds Line PRM FE Performance Report Monitoring Far End Seconds with LOS gt 1 The PRM from the network indicates errors and the signal received from the CPE is error free PDVS L Pulse Density Violation Seconds Line B8ZSS B8ZS Monitored Seconds Seconds with excessive zeroes Seconds with B8ZS detection when AMI AMI 16 zeroes B8ZS 8 zeroes option is active ES P Errored Seconds Path MSEC Monitored Seconds of the current Seconds with SEF CRC ESF or 15 minute 1 hour 1 day screen FE SF gt 1 a Only displays on H2TU R Performance History screens b Displays on the DS1 Current Statistics screens Severely Errored Frame
20. accordance with the ADC published specifications and documentation for such software ADC s entire liability for software that does not comply with the foregoing warranty and is reported to ADC during the 90 day warranty period is at ADC s option either a return of the price paid or b repair or replace of the software ADC also warrants that for a period of thirty 30 days from the date of purchase the media on which software is stored will be free from material defects under normal use ADC will replace defective media at no charge if it is returned to ADC during the 30 day warranty period along with proof of the date of shipment The transportation charges for shipment of returned products to ADC will be prepaid by the Buyer ADC will pay transportation charges for shipment of replacement products to Buyer unless no trouble is found NTF in which case the Buyer will pay transportation charges ADC may use reconditioned parts for such repair or replacement This warranty does not apply to any product which has been repaired worked upon or altered by persons not authorized by ADC or in ADC s sole judgment has been subjected to misuse accident fire or other casualty or operation beyond its design range Repaired products have a 90 day warranty or until the end of the original warranty period whichever period is greater ADC DISCLAIMS ALL OTHER WARRANTIES EITHER EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF
21. active loopbacks 4 Once selected the display changes to MAN MTA Once the MTA mode is selected and activated the MTA mode remains active until it times out based on the LBTO setting When the MTA mode times out the display then returns to the normal display mode January 9 2002 H2TU C 319 List 4E LTPH UM 1049 02 Issue 2 Testing You can also manually terminate the MTA state and exit the MAN LPBK mode by simultaneously pressing the MODE and LBK pushbuttons for 3 or more seconds If no loopback or MTA is active the MAN LPBK mode automatically terminates after 30 seconds IN BAND LOOPBACK SESSIONS The following sections provide step by step test procedures for verifying the integrity of the HDSL2 channels at every module location as well as the DS1 channels to the customer and the local DSX 1 interface General Troubleshooting Tips If trouble is encountered on the DSX 1 interfaces of the H2TU C verify that the e H2TU C is making a positive connection with its shelf connector e H2TU C internal equalizer is set to the correct distance range as shown in Table 5 on page 18 All equalizers should be set to the distance from the DSX 1 to the shelf The transmit and receive DSX 1 ports have splitting access jacks and miniature 210 series bridging jacks as shown in Figure on page 3 Connecting one cable between the two bridging jacks and another between the two LINE jacks splits the IN and OUT and creates metallic loopbacks toward b
22. and Power Back Off Customer PBOC allow the HDSL circuit to support two transmit power templates default DEF higher level and enhanced ENH lower level These are defined in Section 6 1 4 2 of the ANSI T1E1 4 HDSL2 standard Each HDSL2 receiver detects the level it is receiving during the start up pre activation sequence It then compares this level to the level it should be receiving according to the PBON and PBOC option settings DEF or ENH If the received level is outside the template limits the receiver sends a message to the upstream HDSL2 transmitter requesting the proper level These levels are adjusted only during the start up routine or if the PBON or PBOC option settings are changed during normal operation Since the ENH template levels are up to 15 dBm below those of the DEF template the ENH setting can be used to reduce crosstalk levels into adjacent circuits For example if crosstalk noise is being induced by the H2TU R set the PBO C option to its lower ENH level setting Conversely if the HDSL2 signal at the H2TU R is being affected by crosstalk noise induced from adjacent pairs set the PBOC option to its higher DEF level setting momentarily drop and then reacquire synchronization This setting can also affect the operating Changing these Power Back Off option settings on a live circuit causes the HDSL2 loop to margins H2TU R DS1 Frame Conversion CONV Option Frame format conversion is only applicable to the remote H
23. are identical because all of the SMJK loopup and loopdown commands are under control of the LPBK setting January 9 2002 H2TU C 319 List 4E LTPH UM 1049 02 Issue 2 Testing SmartJack Loopback Commands The HiGain HDSL2 SmartJack SMJK Loopback LPBK commands allow you to use in band out of band and universal codes to initiate and terminate loopback testing of the HiGain HDSL2 circuit See SmartJack Test Procedure on page 64 for additional information MANUAL LOOPBACK SESSION A manual loopback session allows you to select any one of the HiGain HDSL2 loopbacks listed in Table 22 on page 56 Setting the Loopback Time Out Option Before initiating a loopback session verify that the Loopback MTA Time out parameter is set to the desired setting 1 Use the MODE and LBK pushbuttons as described in Setting Options through MODE and LBK on page 10 The Loopback Time out parameter is also user selectable from the System Settings screen when using a maintenance terminal 2 Select the desired setting NONE time out disabled e 20 minutes e 60 minutes e 120 minutes default setting Activating Manual Loopback Mode e With the exception of SmartJack any of the HiGain HDSL2 loopbacks can be executed using the 4 MODE and LBK pushbuttons When executing a manual loopback session using the MODE and LBK pushbuttons The next loopback option can be displayed by pressing the MODE pushbutton however the previously
24. ee ee 18 H2TU C 319 List 4E ADC Config Menu Options eee ee sees Ge ee GR GR ee Ge ee Ge ee ee ee ee SKIENE ee ke 19 DSI and DSX 1 24 hour PM Threshold eee see se ee ee ee Ge GR GR GR ee SR ee Ge ee ee Ge Gee Re GR ee ee 22 Response to H2TU R DS1 Frame Conversion Options sees see see ese ee ee ee ee ee ee ee Ge Gee Re Ge ee ee 24 Extended SuperFrame Format cece see see ee se ee ee ee ee ee Ge Errio Ge ee GR GR ee e ee Gee Gee Re Ge ee Re Ge ee 25 ouperFrati Formatie nosie ee ee egg ee sees gegee NE boge gie Bere ENG Dee A E ge ese ee gee 25 DDS NI and DSO DP Latching Loopback Sequence ee se ses se ee Ge Ge ee ee ee ee ee Re Gee RA GR ee 26 HiGain HDSL2 Loopback vs Latching Sequence sees ee see see se ee see ee ee Se ee ee ee ee Ge Gee Re Ge ee 26 Response of H2TU C 319 List 4E and H2TU R to LOS and AIS ee se ese se ese ee see see Ge Gee ee Ge ee ee ee 27 Monitor Screen Descipons EE ge ee Boek OE EE ge Ee Ee eg NE ee Ee Reg ERG SEER Gee RENEE De vee a Bee ese 36 Error Acronyms Used on the DS1 Performance History Screens ses ese se ese ee ee ee ee Gee Re Ge ee 39 Error Acronyms Used on the HDSL2 Performance History Screens 000 0 see se ese se ee ee ee se ee ee 41 DIE SEG OD eie RR OE OE OE EE OE ER 45 J ADSE2 Alarm Descriptions ia 3a cos EE e Geese ents tay sedate heed KERE se tied Gee oes vd eons best eene ee Ee ER ee ee se Reede 47 Event log Entry Messages List Nes RE ices ee Ee es hive etic Ge
25. errors This value is a running total of the last 24 hours Unavailable Errored Seconds The number of seconds the HDSL2 loop is unavailable This occurs after 10 contiguous HDSL SES and is retired after 10 contiguous non SES seconds This value is a running total of the last 24 hours Circuit identification ID number Loop Attenuation Indicates the attenuation of the Overlapped Pulse Amplitude Modulation Transmission with Interlocking Spectra OPTIS pulse from the distant end The value is related to the 196 kHz loss of the cable pair The loop attenuation is a more direct indication of the loop attenuation to the OPTIS signal than is the 196 kHz loss The normal HiGain HDSL2 LA operation range is from 0 to 40 dB Line Power Feed Indicates the HDSL2 line power is on Margin The signal to noise ratio at all HDSL2 ports relative to a 107 Bit Error Rate Margin Alarm Indicates the margin on HDSL2 loop has dropped below the threshold 0 to 15dB as set by the operator HG displays when the loopback was initiated from a HiGain HG front panel or by a HiGain maintenance terminal loopback command PL displays when the loopback was initiated by a command embedded in the DS1 data path payload PL The sum of the Performance Report Messaging Near End PRM NE and Performance Report Messaging Far End PRM FE counts The presence or absence of an alarm condition is indicated on the lower right corner of all screens System OK indica
26. out see Setting the Loopback Time Out Option on page 57 If the Time Out Override code 1101 0101 1101 0110 D5D6 is received after activating a loopback then the automatic timed expiration of the loopback is inhibited If this Time Out Override is sent then the only way to loop the H2TU C down is to do one of the following e Issue the IR Intelligent Repeater LPDN loopdown code 1001 0011 1001 0011 9393 e Issue the NI LPDN and Disarm in band code 11100 or the ESF DL code FF24 62 January 9 2002 H2TU C 319 List 4E LTPH UM 1049 02 Issue 2 Testing e The Time out Override function is only valid for the current active loopback The automatic 4 time out timer is restored during subsequent loopback sessions 5 Once the test is complete do one of the following e Ifthe system is to loopdown but remain Armed send the IR Intelligent Repeater LPDN code for universal loopdown e Ifall the equipment is to be looped down disarmed and returned to normal operation send the disarm in band code 11100 or the ESF DL code FF24 The Armed mode has an automatic time out of 120 minutes but this timer is reset to 120 for any of the following events Loopback terminates manually or time out Query Alternate query Far End activate Another ARM command This timer is inhibited while any of the valid command codes are being sent Once the codes are removed the timer restarts at 120 H2TU C 319 List 4E January
27. press the MODE pushbutton for 3 or more seconds The H2TU C displays the following parameters H2TU C software version number H2TU C list number Type of frame pattern received from the DSX 1 Line code of the signal received from the DSX 1 All user configured parameter settings Loop attenuation threshold setting Margin alarm threshold setting Disabling an Alarm System alarms can be disabled by pressing the LBK pushbutton on the H2TU C front panel This executes an ACO and returns the H2TU C to its non alarm state For more information see Retiring System Alarms on page 53 Loopback Modes See Loopback Operation on page 55 for instructions on using the MODE and LBK pushbuttons to activate loopbacks H2TU C 319 List 4E January 9 2002 11 Provisioning LTPH UM 1049 02 Issue 2 USING A MAINTENANCE TERMINAL Connecting to a Maintenance Terminal The craft port on the front panel allows you to connect the H2TU C to a maintenance terminal ASCII terminal or PC running a terminal emulation program Once connected to a maintenance terminal you can access the maintenance provisioning and performance screens To connect to a maintenance terminal 1 Connect a standard 9 pin terminal cable to the RS 232 craft port as shown in Figure 1 on page 3 on the front panel 2 Connect the other end of the cable to the serial port on the maintenance terminal 3 Start a terminal emulation program such as Procomm that emulates a VT1
28. reliably with a random 10 Bit Error Ratio BER on the facility The entire loopback sequence can also be initiated at the remote H2TU R location SmartJack Test Procedure The HiGain H2TU R supports the standard SmartJack loopback which can emulate a Network Interface Device NID for the purpose of loopback testing of the HiGain HDSL2 circuit SMJK and NREM loopbacks perform the same functions but their initiation differs SMJK indicates that the loopback was initiated by any of the three SmartJack loopup commands listed in Table 25 NREM on the other hand is initiated by the 3 in 7 in band command or by a command issued from the maintenance terminal The SmartJack loopback option LPBK enables or disables the ability of the H2TU R to emulate the family of SmartJack loopback commands listed in Table 25 Table 25 SmartJack Loopup and Loopdown Commands In Band 2 in 5 In Band 3 in 5 Dare Band OutofBand own Band 1 in 6 In Band 1 in 3 Loopup Code Loopdown Code Codes pup Codes p Loopup Code Loopdown Code 11000 111000 1111 111 0100 1000 1111 1111 0010 0100 100000 100 a These universal loopdown codes can release any and all existing loopup states regardless of loopback direction or method of initiation The codes are permanently enabled and independent of all loopback option settings including the LPBK option 64 January 9 2002 H2TU C 319 List 4E LTPH UM 1049 02 Issue 2 Appendix A Specifications
29. the LOSW alarm and identifies the span where the LOSW alarm occurred Upon reception of an RAI yellow LED from the CPE the H2TU R sends RAI Cl toward the network if the network signal received at the H2TU R is clear If the network signal is impaired LOS AIS or Loss of Frame LOF then the RAI is automatically passed on to the network Accompanies the HBER MAL and LA alarm and indicates that the alarm has occurred at the H2TU R remote unit Accompanies the HBER MAL and LA alarm and indicates that the alarm has occurred at the H2TU R remote unit H2TU C 319 List 4E Continued January 9 2002 5 Front Panel LTPH UM 1049 02 Issue 2 Table 2 Front Panel Display Messages Continued Message Full Name Description LOOPBACK MESSAGES CLOC Customer Local Loopback Signal from customer is looped back to the customer at the H2TU R CREM Customer Remote Loopback Signal from customer is looped back to the customer at H2TU C NLOC Network Local Loopback DSX 1 signal is looped back to the network at the H2TU C NREM Network Remote Loopback DSX 1 signal is looped back to the network at the H2TU R SMJK Remote SmartJack Loopback DSX 1 signal is looped back to the network at the H2TU R SmartJack module DIAGNOSTIC MESSAGES A Xx Maximum Loop Attenuation The Attenuation A message appears followed by xx where xx is the loop attenuation of the longest maximum loss span measured in dB ACQ Acquisition The multiplexer
30. the customer 6 in 7 at the H2TU C X A Special Loopback Commands 56 In addition to the GNLB loopback command mode a HiGain HDSL2 system can be configured for one of three special loopback command modes These are selected from the maintenance terminal Config menu ADC Options screen see Table 5 on page 18 or by using the MODE and LBK pushbuttons see Figure 32 on page 60 Once a loopback mode is activated other loopback commands can be sent by a test set connected to the craft port of the H2TU C or H2TU R see Table 22 on page 56 and Table 24 on page 64 for list of SPLB commands A2LB through A4LB are special addressable repeater loopback modes that are supported by the H2TU C These loopback modes provide the HiGain HDSL2 system with sophisticated maintenance and troubleshooting tools A2LB is patterned after the Teltrend addressable T1 repeater loopbacks A3LB and A4LB are patterned after the Wescom addressable T1 repeater loopbacks All three SPLBs have been enhanced to handle the specific requirements of the following HiGain HDSL2 customers e A LB Teltrend Southwestern Bell e A3LB Wescom New England Telephone Bell Atlantic A4LB Wescom Mod 1 New York Telephone A2LB can be configured to do one of the following e Block the arming code after 2 seconds from exiting the H2TU C into the network and replace it with the AIS code e Unblock the AIS code by executing the Far End Activate code A3LB and A4LB
31. the high density HD shelf The H2TU C forces pin H to 5 Vdc maximum of 10 mA for a system alarm condition Pin H then remains at 5 Vdc for the duration of the alarm condition If the Wescom 1184 Alarm Card is installed in the shelf its LOS LED lights for every MNRALM The H2TU C Status LED flashes red for the duration of a system alarm condition Setting the ALM option to DIS only prevents the system alarm bus on pin H from being activated for a system alarm event The Status LED still flashes red and the ALRM message still displays System Alarms on page 52 describes the system alarms that activate pin H Pin H must never be taken above 5 Vdc or below 60 Vdc January 9 2002 H2TU C 319 List 4E LTPH UM 1049 02 Issue 2 Appendix A Specifications CRAFT PORT Figure 35 shows the pinout for the craft port connector and its connection to a DB 9 or DB 25 connector on a maintenance terminal Terminal DB 9 Connector DTE H2TU C 319 DB 9 Connector DCE TD Transmit Data RD Receive Data GND Terminal i i I DB 25 Connector i DTE j Figure 35 RS 232 Craft Port Pinouts H2TU C 319 List 4E January 9 2002 71 APPENDIX B FUNCTIONAL OPERATION ADC HDSL2 technology provides full duplex services at standard DS1 rates over copper wires between an H2TU C and an H2TU R which comprise one HiGain HDSL2 system HiGain HDSL2 systems use ADC Overlapped Pulse Amplitude Modulation PAM
32. xxx denotes either TUC or TUR Loop Attenuation The attenuation on the HDSL2 loop has exceeded the maximum value set for the HDSL2 loop attenuation threshold xxx denotes either TUC or TUR Block Error Rate The HDSL2 BER has exceeded the set threshold limits of 10 or 10 xxx denotes either TUC or TUR Indicates a short between the Tip and Ring of the HDSL2 pair The HDSL2 loop is grounded Indicates a line power open condition a Displays only on the H2TU C HDSL2 interface H2TU C 319 List 4E January 9 2002 47 Monitoring System Activity and Performance LTPH UM 1049 02 Issue 2 USING THE SYSTEM EVENT LOG TO TRACK EVENTS To view a running log of system events press E to select the Event Log The Event Log displays the date and time of the 100 most recent events most recent displayed first and provides a description of each event Table 19 on page 49 lists the event log messages e Press N or P to page through the event log e Press T to return to the top of the log e Press L to clear the event log Monitor Performance BRR Config Inventory Report Rlogon System Event Log Page 1 of 7 Origin Date and Time System O7 21 01 124254 DS1 Alarm Register reset System 07 22 01 12 25 DSL2 Alarm Register Reset System 07 23 01 12 25 S1 Performance Register Reset System 07 24 01 12 25 DSL2 Performance Register Reset System 07 25 01 00 13 ime set 12 25 00 System 07 26 01 00 13 ate set 10 21 00 H2TU C
33. 00 terminal 4 Configure the maintenance terminal to the following communication settings e 9600 baud e No parity e 8 data bits e 1 stop bit e Hardware flow control to OFF 5 If necessary press CTRL IR to refresh the HiGain HDSL2 logon screen The Logon Screen The HiGain HDSL2 maintenance terminal screens allow you to monitor provision and troubleshoot an H2TU C system To select a menu from the HiGain HDSL2 logon screen shown in Figure 3 on page 13 do one of the following e Press the underlined letter of the menu e Use the gt arrow keys to select the menu and press ENTER Table 3 summarizes the navigational keys They are also listed in the onscreen Help menu Table 4 on page 13 describes the Logon screen menus Table 3 Navigational Keys for the HiGain HDSL2 Maintenance Terminal Screens Key Function SPACEBAR Cycle through selections ENTER Activate the current setting or choice or display a menu ESC Return to the parent menu T or CTRL HIE Select the submenu or item above the current one or return to the previous menu 1 Or CTRL X Select the submenu or item below the current one gt or CTRL ID Select the menu or item to the right of the current one lt OrLCTRL 1IS Select the menu or item to the left of the current one or return to the previous menu CTRL IR Refresh the screen a Legacy management units require the use of control keys instead of arrow keys 12 January 9
34. 07 27 01 00 13 LOC Loop down H2TU C 07 28 01 00 11 LOC Loop up H2TU R 07 29 01 00 10 S1 LOS Alarm End H2TU R 07 30 01 00 18 S1 LOS Alarm Begin System 07 31 0 00 04 S1C AUTO to AMI H2TU C 08 01 0 00 00 DSL2 LOSW Alarm End H2TU C 08 02 01 00 00 DSL2 LOSW Alarm Begin EMPTY EMPTY THOUURZAZUHRUE Press N ext Page P revious Page T op of Log C 1 ear Log x x XXX XXXX 08 01 2001 07 07 54 H2TU C System Figure 28 System Event Log 48 January 9 2002 H2TU C 319 List 4E LTPH UM 1049 02 Issue 2 Monitoring System Activity and Performance Table 19 Event Log Entry Messages List Event Log Messages Any DS1 Alarm History reset Any DS1 PM register reset Any HDSL2 Alarm History reset Any HDSL2 PM register reset Any Loop Down any segment Any Loop Up any segment Any provisioning option change lt provisioning mnemonic gt changed from lt old gt to lt new gt CPE DBER alarm 1 day threshold crossed of any PM data except PRM NE or PRM FE CPE DS1 AIS begins ends CPE DS1 LOS begins ends CPE PRM NE BER alarm at the remote only 1 day threshold crossed of PRM NE trouble on CPE receive Current statistics reset Event Log reset H2TU C Power up down H2TU R Power up down HDSL2 DC pair open begins ends on any segment HDSL2 Ground fault begins ends on any segment HDSL2 HBER alarm threshold crossed on any segment HDSL2 lo
35. 10 Fusealarm Metallic po OUT MANIE Tip E E 13 MATIF Ring oo Metallic Access TB6 LIN MATIE Tip 32 m 14 MATIE Ring iN J TBS OO 15 Segment2 OO 16 Ol O 17 L 18 Fuse alarm is normally floating Segment 3 A L and 1 10 are and at 48 Vdc when activated from standard 3192 alphanumeric connector pins as reflected on the labels on the backplane of the HMS 358 shelf Figure 33 H2TU C 319 List 4E Card Edge Connector 68 January 9 2002 H2TU C 319 List 4E LTPH UM 1049 02 Issue 2 Appendix A Specifications Figure 34 shows the generic labeling of the connector as it appears on the backplane with HMS 358 shelf Note that the H2TU C has no connections to Loop B of Group 1 The HMS 358 technical practice refers to Group 1 and Group 2 as Port 1 and Port 2 respectively AUX LoopA Tip 190 01 AUX Loop A Ring Group Port2 4 AUX LoopB Tip 200 02 AUX Loop B Ring Group Port 2 3192 MECH gt DSX XMT from MUX Tip o 3 1 DSX XMT from MUX Ring DSX RCV to MUX Tip o 4 2 DSX RCV to MUX Ring gt os 3 o6 4 o7 5 gt Line Loop A Tip o8 6 Line LoopA Ring Group Port 1 o9 7 L Group Port 1 O1 8 _ Line Loop B Tip o1 9 Line Loop B Ring _ 10 210 o3 220 O4 230 o5 240 Oo 6 250 O7 26 O Oo 8 Figure 34 HMS 358 Backplane H2TU C 319 List 4E Card Edge Connector Labeling Network Management Control Bus The H2TU C provides a Net
36. 2TU R but selectable by the H2TU C or H2TU R This option enables the network to be ESF which is H2TU C 319 List 4E January 9 2002 23 Provisioning LTPH UM 1049 02 Issue 2 used to embed SPRM or NPRM into the datalink toward the network During conversion frame bit errors are regenerated to ensure transparency The HDSL2 system attempts to find ESF or SF framing or determines that no framing exists The DS1 framing is then synchronized with the HDSL2 frame If the framing is lost the system generates an Out of Frame OOF defect which results in UAS P As a result the system reverts to frame search mode This option has the following settings e OFF No frame conversion takes place All framing issues are determined by the FRMG option settings of AUTO and UNFR e ACON This is the automatic conversion setting If the system detects ESF from the network and SF from the CPE it automatically converts the CPE SF to ESF toward the network as well as the network ESF to SF toward the CPE Upon power on reset after loopdown or after changing the frame conversion option the framing needs to be re established before a complete conversion takes place If there is a failure condition LOS AIS or LOF during steady state the previous conversion state is maintained to ensure continuity when the system returns from the failure condition If SF is received from the network the H2TU R forces an ESF toward the network for about 1 5 seconds Thi
37. 59 A2LB Test Procedures 3 2 55 asse ese se eke GEROER RE sapiens csvbdesstectensnsste esc Bee Ge eo Ge VEVE ese ed 61 ASLB and AALB Test Procedures sis ed gee Ee Es laud oe E Gee Re ERGER tos 64 SmartJack Test Procedures ies ss SERE ESE READER Ge GERS Rd ERGE UR en gegee e E ER ERGE ER GER Eg 64 Appendix A Specifications 65 Power Consumption ccs sek EER ON OE EE RR OE testbed 66 EN olie Power D1Ssipation ss OE N EE EE N EE RE 66 M ximum Current DE AO EE OE OR EE attests 66 Loop Attenuation Insertion Loss and Reach sesse see see ee AA ee RA ee Re AR ee GR Re ee ee 67 H2TU C 319 List 4E Card Edge Connector iese ses see see se see se ee ee ee se ee Gee Re Ge Re ee ee ee ee 68 Network Management Control Bus iese se se se ee se ee ee Ge Ge GR AR GR RR Re Se ee ee ee 69 Buse Alarm sis cherie OE RE N OE RE EE india 69 System Alarm Output Pin oo see sesse ee se se ee E ee Ge RA GR N GR Re ee ee E Ge ee 70 GE ER EE ORE ER OE EE N EE EER ER ONA 71 Appendix B Functional Operation 72 DE EE RE EE EE EE EA EE 73 Ground Fault Detectie RE ee alle hee eek heh VERE iw De Ee ean Reais 73 Appendix C Compatibility 74 Appendix D Product Support 75 echnical Supports cscs EE OE ER AE OE OE licen al estes 75 lie EE RR OR EE OE OE OE EE N Ee 75 Appendix E Abbreviations 76 Certification and Warranty Inside Back Cover January 9 2002 H2TU C 319 List 4E LTPH UM 1049 02 Issue 2 List of Figures LIST OF FI
38. 7 Appendix E Abbreviations LTPH UM 1049 02 Issue 2 78 January 9 2002 H2TU C 319 List 4E CERTIFICATION AND WARRANTY FCC CLass A COMPLIANCE This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense LIMITED WARRANTY ADC DSL Systems Incorporated ADC warrants that for a period of sixty 60 months from the date of shipment the hardware portion of its products will be free of material defects and faulty workmanship under normal use ADC s obligation under this warranty is limited to replacing or repairing at ADC s option any such hardware product which is returned during the 60 month warranty period per ADC s instructions and which product is confirmed by ADC not to comply with the foregoing warranty ADC warrants that for a period of 90 days from the date of purchase the software furnished with its products will operate substantially in
39. 9 2002 63 Testing LTPH UM 1049 02 Issue 2 A3LB and A4LB Test Procedures The H2TU C can be looped back by sending the Addressable Office Repeater AOR LPBK activation code 1111 1111 0001 1110 FFIE for at least 5 seconds This causes the H2TU C to enter the NLOC state The Loopback Time out setting see Setting the Loopback Time Out Option on page 57 determines the duration of this loopback unless it is overridden by the reception of a second identical 16 bit loopup command before the timer expires When this time out override state exists the only way to loop the H2TU C down is to issue one of the three loopdown commands listed in Table 25 The automatic time out mode is restored during subsequent loopback sessions Table 24 summarizes the codes required to execute Addressable 3 and 4 A3LB and A4LB repeater loopback commands that are identified in H2TU C HDSL2 products All code sequences must be present for at least 5 seconds Information specific to HiGain HDSL2 regenerators is shown in bold Table 24 Addressable Repeater Loopback Commands A3LB and A4LB Name Description Binary Code Hexadecimal Equivalent NLOC H2TU C loopup from NI 1111 1111 0001 1110 FF1E CREM H2TU C loopup from Cl 0011 1111 0001 1110 3F1E NREM H2TU R loopup from NI 1111 1111 0000 0010 FFO2 CLOC H2TU R loopup from Cl 0011 1111 0000 0010 3F02 a The leftmost bit arrives first in all sequences The detection algorithm functions
40. CI signal is transmitted in band by setting each of the 24 channel time slots to 1000 1011 left to right In addition to the criteria specified above the generation of SF RAI CI has to be held for 1 second to examine the DSO channels for the presence of a frame with an all zeroes pattern If present the generation of SF RAI CI is suspended for the duration of the all zeroes pattern In all SF environments the H2TU R automatically converts a CPE DS1 payload with an embedded RAI signal into an RAI CI pattern toward the network if the RACI option is enabled default Such a conversion affects the payload as described above Disable RACI to avoid this payload affecting conversion conversion is active the CONV option is set to either ACON or FCON the SF RAI is converted The SF RAI to SF RAI CI option is only applicable in an all SF framing environment If SF to ESF into ESF RAI in the FDL regardless of the RACI setting ESF RAI to SF RAI Overwrite ROVR Option If the ESF RAI to SF RAI Overwrite ROVR option is enabled it allows a network ESF RAI or ESF RAI CI pattern to be converted into a CPE SF RAI or SF RAI CI pattern and overwrites the payload bits with the specific alarm patterns If the ROVR option is disabled it prevents conversion of a network ESF payload with an embedded RAI pattern and preserves the integrity of the CPE payload as it was originally transmitted Power Back Off PBOC and PBON Option Power Back Of Network PBON
41. E LTPH UM 1049 02 Issue 2 Monitoring System Activity and Performance USING THE MONITOR SCREEN TO VIEW SYSTEM ACTIVITY 1 Press M to view the system diagram Figure 15 shows an armed circuit with an active loopback and alarms Terms used on the system diagram are defined in the onscreen Help menu glossary Abnormal situations are highlighted on the diagram Table 14 on page 36 describes the screen field DS1 Errors Armed mode Margin Loop attenuation Alarm type HDSL2 Errors a Perto mance Event 2001 06 47 30 H2TU C System Alarm Line code and framing Active loopback System status Figure 15 Monitor Screen Active Loopback with Alarms 2 To initiate a loopback press the SPACEBAR to cycle though the loopback choices Press ENTER to select your choice When prompted with the message Are you sure Y N press Y to initiate the loopback or N to cancel For more information about loopbacks and troubleshooting see Testing on page 52 3 To initiate a loopdown of all active loopbacks press the SPACEBAR to select LPDN then press ENTER When prompted with the message Are you sure Y N press Y to initiate the loopdown or IN to cancel H2TU C 319 List 4E January 9 2002 35 Monitoring System Activity and Performance LTPH UM 1049 02 Issue 2 Table 14 Monitor Screen Descriptions Field Active Loopback Alarm Type Armed Mode Code Type DS1 ES Count DS1 SES Count DS1 UAS Coun
42. G There are two provisioning methods Use the MODE and LBK pushbuttons on the front panel of the H2TU C to Set system options Reset the H2TU C to its factory default settings for system options Display system option settings scroll mode Select system loopbacks Select MTA test mode Use a maintenance terminal such as an ASCII terminal or a PC running terminal emulation software connected to the H2TU C craft port or an HMU craft port to access the maintenance screens Figure 3 on page 13 shows the maintenance screen This provides full access to all H2TU C status history inventory and provisioning screens e No dip switches or jumpers are required to provision the H2TU C as it contains a non volatile Z RAM NVRAM which stores the system option settings System option settings are retained if shelf power is lost or if the H2TU C is unplugged USING THE MODE AND LBK PUSHBUTTONS Setting Options through MODE and LBK To provision the H2TU C through the MODE and LBK pushbuttons on the front panel 1 10 Press the MODE pushbutton for 1 second and then release it The front panel display alternately shows the first system parameter and its current setting Press the LBK pushbutton to step through all possible settings of the selected parameter After the desired setting has been selected press the MODE pushbutton This updates the current displayed parameter to the selected setting then advances to the
43. GURES EN VO oo HOU BL N H2TU C 319 List 4E Front Panel iii iii ese Gee GEBERG bees Gee Seks ee ese EE Ee cu onsacuhevscbenscvasssteveasiesebepscbechebevbebessebonte 3 Installing the H2TU C 319 List 4E into a Shelf oo see se ee ee ee Ge GR GR ee Ge ee Ge ee ee ee ee ee Ge ee ee 8 ME Te AE EN 13 Contig MenuDate atid Times ds RES Ee ER DE Re EN Eg Se ge gede eg Se Ge eek De Nee 14 Inventory ei ie N AE OE OE EE E ERA 15 Confis ARE ER OR OE N EE EER HOE EE OE OE GE 16 Config Menu Standard Options defaults SHOWN eee se se ee ee ee ee Ge GR AA GR RR GR GR Re Re Ge ee ee ee ee ee 17 Config Menu ADC Options defaults shown 00 0 see see see ee be GR GR Ge GR ee ee ee ee ee Ge RA GR RA GR Ge ee 17 Metallic T stAccess Block Diagrams gers eis SENSE pureestennevadeses eao Ee Re kg Bee eg GR Re Ee Ged dees GR gesels 28 MTA Relay EE RE EE OR EE EE OR OR EE ON OE HOES 29 Metallic Test Access TB6 on HMS 358 Backplane esse see sesse ee se ee ee Gee Ge Re RA Se ee ee ee ee ee 29 H2TU C 319 List 4E ode dB GO AE EE EE EO N 30 Config Menu Reset to Factory Default esse see se se aiee ee GR AA GR RR GR Ge Re Re ee ee ee ee ee ee 32 Config Menu Master Clear iese ses see se se ee SR Ge Re Ge Ge Ge ee ee ee ee Re doako r Ee GR ee Re GR GR ee ee ee ee ee ee ee 33 Monitor Screen Active Loopback with Alarms ies sesse se se Se ee ee Ge RA GR ee RR SR ee Ge ee ee ee ee ee 35 H2TU R DSI 31 Day Performance H
44. H2TU C 319 2 Q Veg CO shelf Figure 2 Installing the H2TU C 319 List 4E into a Shelf When installing an H2TU C in a chassis be sure to wear an antistatic wrist strap Avoid touching components on the circuit board gt shields of the ABAM type cables that connect the H2TU C DSX 1 output ports to the To comply with the intrabuilding wiring requirements of GR 1089 CORE Section 4 5 9 the N cross connect panel must be grounded at both ends 1 Align the H2TU C with the enclosure slot guides then push the unit in until it touches the backplane card edge connector 2 Place your thumbs on the H2TU C front panel and push the H2TU C firmly into the slot guides until the unit clicks into the backplane and is properly seated 8 January 9 2002 H2TU C 319 List 4E LTPH UM 1049 02 Issue 2 Installation VERIFICATION Once the H2TU C is installed verify that it is operating properly To do this monitor the following e Status LED e Status messages reported by the front panel display Table 2 on page 5 lists the status messages Verification without an H2TU R Remote Unit If there is no H2TU R remote unit installed 1 Verify that the H2TU C powers up The front panel display illuminates and reports status messages See Table 2 on page 5 lists the messages 2 Verify that the H2TU C attempts to communicate with a remote unit status LED flashes red Even if a remote unit is not present the followi
45. H2TU R DS1 input port By default see Figure 30 on page 54 AIS CI is sent toward the network RRAI Remote Alarm Indication Indicates an RAI alarm yellow from the CPE with errors from the line unit or network TRCI Transmit RAI Cl Remote Alarm Indication at the H2TU R Upon reception of an RAI yellow LED from the CPE the H2TU R sends an RAL CI towards the network if the network signal received at the H2TU R is clear If the network signal is impaired LOS AIS or LOF then the RAI is passed on to the network unaltered This is applicable to SF or ESF framing In an all SF environment RACI must be enabled to convert SF RAI to SF RAI Cl PRMN Performance Report Monitoring Near End The count of the PRM NE register at the H2TU R exceeds the 10 BER threshold at 648 events since 12 00 00 AM PRMF Performance Report Monitoring Far End The count of the PRM FE register at the H2TU R exceeds the 10 BER threshold at 648 events since 12 00 00 AM Continued H2TU C 319 List 4E January 9 2002 45 Monitoring System Activity and Performance LTPH UM 1049 02 Issue 2 Table 17 DS1 Alarm Descriptions Continued Screen Alarm Front Panel Alarm Description DBER XXX DBER Bit Error Rate The DS1 BER has exceeded the built in 24 hour threshold limits of approximately 106 xxx denotes either TUC or TUR a This is a DS1 specific alarm that also issues a minor alarm sent to the management unit or the backplane if enabled
46. IStOTW cscs ese Gees Ee REGSE RENS Ge N Se SG eE on GESE RR ee ee Gegee gee ee Gee ge R ee REG ee Bees 38 H2TU R DS1 25 Hour Performance History esse ese se ese ese ese ese ese res siso te a Koorts GR ee GR AR GR ee Re ee ee ee ee ee 38 H2TU C DS1 48 Hour Performance History esse se ese ese ese ese ese ee se ese be Ge n OE Ge GR ee GR AR GR ee ee ee ee ee 39 H2TU C HDSL2 31 Day Performance History 00 se ese ese ese ese ese ee se ese ee Ge ee ee GR ee Re eke ee ee ee ee ee ee ee ee 40 H2TU C HDSL2 48 Hour Performance History 20 0 sesse ese ese ese ese ee se ese ee se ee eek ee eke ee ke eke ee ee ee ee ee ee be ee ee 40 H2TU C HDSL2 25 Hour Performance History 2 0 0 eee see esse ese ese ee se ese ee se ee dee Gee ee ke eke ee ee ee ee ee ee be be ee ee 41 HZ TUER DSI Current Statistics SEE vores cei EE Ee Ee ese ee ete ees bates RE Ee pe Ee tee gee ER ee 42 H2TU C DSI Current Statistics RR OE OE OR OE OR EE EE OE 42 H2TU C ADSL Current Statistics n sn aoe ee eee thie cee ths eS nee Saloon eee 43 H2TU E DSi Alarm History Screens diss oi ee Es ER RES se bisects SESDE Be uses arse Ge ees RD ER ee Ere ee Ee Ee ase 44 H2TU R DSI Alarm History SCreemics eierniie aeee eai ire se De ens ee eg sede Be A ee ge bade taurine 45 H2TU C HDSL2 Alarm History Screen oo se ese ese ese ee se ese ee ge ee ee ke ee ee Re Gee Se ee ee ee ee ee Gee RA GR ek ee ee 46 System Event LoS SG SR EE Ee ERG AR EE ces dans SN se NE ta sale tees dacs ea
47. L2 loop is not grounded or shorted The transceivers of the H2TU C and H2TU R or the H2TU C and first regenerator are trying to establish contact with each other over the HDSL2 loop of Span 1 January 9 2002 Continued H2TU C 319 List 4E LTPH UM 1049 02 Issue 2 Front Panel Table 2 Front Panel Display Messages Continued Message Full Name Description SYSTEM INFORMATION MESSAGES CODE xxxx Line Code AMI or B8ZS The DS1 line code setting Alternate Mark Inversion AMI or Bipolar with 8 Zero Substitution B8ZS FRM xxxx Frame SF ESF or UNFR Defines the type of frame pattern being received from the DSX 1 SuperFrame SF Extended SuperFrame ESF or Unframed UNFR LATT xx Loop Attenuation The current loop attenuation threshold setting measured in decibels LIST xx H2TU C List Number The list number of the H2TU C MARG xx Margin The current margin threshold setting measured in decibels VER x xx H2TU C Software Version Number The software version number X xx a System information messages are displayed in Scroll Mode To scroll through the messages press the MODE pushbutton for 3 or more seconds H2TU C 319 List 4E January 9 2002 7 Installation LTPH UM 1049 02 Issue 2 INSTALLATION e Upon receipt of the equipment inspect the contents for signs of damage If the equipment has been damaged in transit immediately report the extent of damage to the transportation company and to ADC
48. M 1049 02 Issue 2 Table 6 H2TU C 319 List 4E ADC Config Menu Options Continued Front Panel Gi Menu Display Selection Description Code Minor Alarm ALM ENA Enables the generation of the output alarm on pin H when a system alarm condition occurs DIS Disables the generation of the output alarm on pin H when a system alarm condition occurs Network AIS Signal NAIS Cl If ALMP is set to AIS this option specifies which pattern is sent to the network when a remote LOS or AIS occurs When configured for Cl an AIS CI pattern is sent to the network AIS When configured for AIS an AIS pattern is sent to the network Performance Report PRM SPRM The H2TU R generates Supplemental PRM SPRM every second if no PRM Messaging is received from the CPE within 5 seconds of a reset or if an LOS AIS LOF condition occurs TL1 commands and responses are enabled NPRM The H2TU R generates Network PRM NPRM if no PRM is present from the CPE If the CPE is sending PRMs NPRM is generated every second in addition to the existing PRM TL1 commands and response are enabled S N The H2TU R generates an NPRM which is tagged onto an SPRM every second The H2TU R generates SPRM if no PRM is present from the CPE If the CPE is sending PRM the PRM is converted to an SPRM TL1 commands and responses are enabled OFF ESF Datalink DL is completely transparent No PRMs are generated There are no TL1 responses unless the system is first armed by a
49. MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE WITH RESPECT TO ITS PRODUCTS AND ANY ACCOMPANYING WRITTEN MATERIALS FURTHER ADC DOES NOT WARRANT THAT SOFTWARE WILL BE FREE FROM BUGS OR THAT ITS USE WILL BE UNINTERRUPTED OR REGARDING THE USE OR THE RESULTS OF THE USE OF THE SOFTWARE IN TERMS OF CORRECTNESS ACCURACY RELIABILITY OR OTHERWISE MODIFICATIONS Any changes or modifications made to this device that are not expressly approved by ADC DSL Systems Inc voids the user s warranty All wiring external to the products should follow the provisions of the current edition of the National Electrical Code SAFETY STANDARDS COMPLIANCE The equipment has been tested and verified to comply with the applicable sections of the following standards e GR 63 CORE Network Equipment Building System NEBS Requirements e GR 1089 CORE Electromagnetic Compatibility and Electrical Safety Binational standard UL 1950 CSA C22 2 No 950 95 Safety of Information Technology Equipment For technical assistance refer to Appendix D Product Support on page 75 ADC DSL Systems Inc 14402 Franklin Avenue Tustin CA 92780 7013 Tel 714 832 9922 Fax 714 832 9924 Technical Assistance Tel 800 638 0031 Tel 714 730 3222 Fax 714 730 2400 DOCUMENT LTPH UM 1049 02 ISSUE 2 1213496
50. Monitor Performance Event hog Inventory Report Rlogon Loopback Timeout LBTO Loop Attenuation Threshold LATT 0 40 argin Threshold MARG 0 15 DS1 Frame Formatting FRMG DS1 Line coding DS1 H2TU C Equalization EQL H2TU R Line Buildout RLBO Alarm Pattern ALMP H2TU R TLOS Loopback TLOS Power Back Off Network PBON Power Back Off Customer PBOC Use lt Spacebar gt to cycle through option settings and lt Enter gt to activate XXXX XXXX XXXX 08 01 2001 06 43 31 H2TU C System OK Figure 7 Config Menu Standard Options defaults shown Monitor Performance Event Log Inventory Report Rlogon Standard Options ADC Options gt Line Power Feed PWRF Remote Provisioning RTPV Bipolar Violation Transparency BPVT DS1 BER DBER DSL2 BER Threshold HBER Special Loopback Mode SPLB Smartjack Loopback LPBK Minor Alarm ALM etwork AIS Pattern NAIS Performance Report Messaging PRM SF RAI to SF RAI CI toward NET RACI ESF RAI to SF RAI Overwrite ROVR 2TU R DS1 Frame Conversion CONV Fractional Tl Mode FT1 Active DS1 Port ADS1 bar gt to cycle through option settings and Sake to activate z3 gt 08 01 2001 06 43 31 System OK Figure 8 Config Menu ADC Options defaults shown H2TU C 319 List 4E January 9 2002 17 Provisioning LTPH UM 1049 02 Issue 2 Table 5 describes the Standard Config screen options and lists their fr
51. Report R Rlogon Rlogout Remote logon can be performed from the H2TU C or H2TU R The screen displays Rlogout when the H2TU C or H2TU R is remotely logged on to the other unit at the end of the circuit To logoff the remote unit press IR Rlogout changes to Rlogon The unit is now locally logged on until Ris pressed again to reinitiate the remote logon H Help Provides a glossary of terms used in the maintenance screens a list of navigational keys and ADC contact information H2TU C 319 List 4E January 9 2002 13 Provisioning PROVISIONING TASKS LTPH UM 1049 02 Issue 2 After the H2TU C is successfully installed perform these basic provisioning tasks Set date and time see Setting Date and Time on this page Set circuit ID numbers see Setting Circuit ID Numbers on page 15 Make any configuration changes see Configuring the System on page 16 Clear history alarm and event log screens to remove miscellaneous data during startup see Clearing the History Alarm and Event Log Screens on page 33 Setting Date and Time 14 A U N Monitor ID XXXX XXXX XXXX XXXX Press C to select the Config menu Performance Event Log Inventory Report Rlogon Standard Options ADC Options Test Mode fete and Time gt Date mm dd yyyy BEZET Time hh mm ss 06 40 11 08 01 2001 06 38 12 H2TU C System OK Figure 4 Config Menu Date and
52. SL2 BER has exceeded the set threshold Select NONE for the HBER Rate limits of 10 or 10 xxx denotes either TUC or system option TUR If TUC and TUR occur at the same time then TUC displays XXX MAL Margin Alarm The margin on the HDSL2 loop has dropped below Set the Margin Alarm the minimum threshold value set for the system xxx denotes either TUC or TUR If TUC and TUR occur at the same time then TUC displays Threshold option to 0 zero XXX LA Loop Attenuation The attenuation on the HDSL2 loop has exceeded the maximum value set for the HDSL2 loop attenuation threshold xxx denotes either TUC or TUR If TUC and TUR occur at the same time then TUC displays a The message ALRM displays prior to any alarm message Set the HDSL2 Loop Attenuation Threshold option to zero a b Only these alarms assert the System Alarm bus on pin H of the card edge connector if the alarm system is set to ENABLE c When the HDSL2 loop loses sync word LOSW a system alarm condition exists The H2TU C enters the acquiring mode the front panel status LED flashes red and the ACQ or SIG message displays instead of the ALRM message Alarm Option for the Digital Loop Carrier Feed To improve HiGain HDSL2 compatibility with the switch to protect features used in the Digital Loop Carrier DLC feeder applications the H2TU C has an Alarm Pattern ALMP option that allows you to select either an AIS or LOS DS1 output payload for
53. System OK Figure 20 H2TU C HDSL2 48 Hour Performance History 40 January 9 2002 H2TU C 319 List 4E LTPH UM 1049 02 Issue 2 Monitoring System Activity and Performance Monitor Event Log Config Inventory Report Rlogon H2TU C HDSL2 25 Hour History Page 1 of 9 N ext Page P revious Page C l ear History lt Space gt to cycle through Interface PAAIE PET choices and lt Enter gt to view Statistics 25 Hour History ID XXXX XXXX XXXX xXxxx 08 01 2001 07 05 33 Figure 21 H2TU C HDSL2 25 Hour Performance History Table 16 Error Acronyms Used on the HDSL2 Performance History Screens Error Acronym Description ES Errored Seconds Seconds with HDSL2 CRC gt 1 or LOSW gt 1 SES Severely Errored Seconds Seconds with HDSL2 CRC 2 50 or LOSW gt 1 UAS Unavailable Seconds Based on 10 contiguous SES occurrences CV Code Violation Total count of HDSL2 CRC errors LOSWS Loss of Sync Word Second Seconds with LOSW 2 1 H2TU C 319 List 4E January 9 2002 41 Monitoring System Activity and Performance LTPH UM 1049 02 Issue 2 Current Statistics Screens for the DS1 Interface Examples of current statistics screens are shown below Figure 22 and Figure 23 show statistics for the DS1 interface at the remote unit and line unit respectively These screens report 1 day 1 hour and 15 minute statistics Refer to Table 15 on page 39 for descriptions of the kinds of errors reported on these scree
54. TL1 command which enables performance monitoring SF RAI to SF RAI CI RACI ENA Allows a DS1 SF RAI yellow alarm signal received by the H2TU R to be Toward Network converted to an SF RAI CI signal toward the network See SF RAI to SF DIS Prevents conversion of the DS1 SF RAI to SF RAI Cl It does not prevent SF RAI CI Toward RAI CI to ESF RAI CI from occurring when FCON is active Network RACI Option on page 23 ESF RAI to SF RAI ROVR ENA If the CONV option is set to FCON or ACON an ESF DS1 payload from the Overwrite network with an embedded RAI pattern is converted to an SF RAI pattern toward the Cl at the H2TU R See ESF RAI to SF DIS Prevents conversion to an SF RAI pattern RAI Overwrite ROVR Option on page 23 H2TU R DS1 Frame CONV ACON Auto ACON detection of framing and potential frame conversion at the Conversion remote See H2TU R DS1 OFF Framing determined by the DS1 frame formatting option Frame Conversion CONV Option on page 23 FCON Auto detection of framing and forced frame format conversion FCON at the H2TU R Fractional T1 Mode FT1 ENA Enables system response to DDS latching loopback commands for fractional See Fractional T1 FT1 Option on page 26 20 T1 applications and enables CPE disconnect or trouble indication See Figure 30 on page 54 for LOS AIS response priorities DIS Disables system response to DDS latching loopback commands for fractional T1 application
55. TU R Net signal does not have errors Transmission Unit Central Office Transmission Unit Remote End Description A system alarm has occurred and has been retired to an ACO condition by pressing the LBK pushbutton on the H2TU C front panel A system alarm condition is in effect A system DS1 BER alarm is in effect and remains in effect until cleared A system HDSL2 Block Error Rate alarm is in effect Indicates that the attenuation on the HDSL2 loop has exceeded the maximum threshold value Indicates an AIS all ones pattern is being received or transmitted at the H2TU C DS1 input or output ports Indicates that no signal is detected at the DSX 1 input to the H2TU C Causes a system alarm Indicates that the HDSL2 loop has lost synchronization The margin on HDSL2 loop has dropped below the threshold 0 to 15 dB as set by the operator Indicates the H2TU C is in a metallic test access state The HDSL2 loop is grounded Indicates a line power open condition Indicates a short between the Tip and Ring of the HDSL2 pair H2TU R PRM FE BER threshold has been exceeded H2TU R PRM NE BER threshold has been exceeded Indicates an AIS all ones pattern is being received or transmitted at the H2TU R DS1 input or output ports Indicates that no signal is detected at the DS1 input to the H2TU R Causes a system alarm Indicates an RAI alarm yellow LED from the CPE with errors from the line unit or network Accompanies
56. Table 27 below This is equivalent to no more than 28 dB loop attenuation Table 27 HDSL2 Reach Chart Cable Gauge errr ma a ge es Q per kft 26 0 4 mm 3 88 3 1 9 83 24 0 51 mm 2 84 2 2 12 52 22 0 61 mm 2 18 1 7 16 32 19 0 91 mm 1 54 1 2 23 16 a Insertion Loss 1 25 times loop attenuation H2TU C 319 List 4E January 9 2002 67 Appendix A Specifications LTPH UM 1049 02 Issue 2 H2TU C 319 List 4E CARD EDGE CONNECTOR Figure 33 shows the pin assignments of the card edge connector on the H2TU C 319 List 4E card The function of its segments S1 S2 and S3 are described beginning with Test Access on page 28 Note that only the set of Standard 3192 alphanumeric connector pins to Segment 3 A through L and 1 through 10 are labeled on the backplane of the HMS 358 shelf The outer set of pin numbers are for reference only and do not appear on the backplane The AUX DSX 1 Segment 1 port can be accessed either by its wire wrapped pins or from mass connector P11 TX and P10 RX on the HMS 358 backplane IN DSX 1 Tip 49 1 4 DSX 1 Ring IN AUX Port AUXPort Segment 1 OUT DSX 1 Tip1 lt 20 2 gt DSX 1 Ring 1 OUT 4 IN DSX 1Tip gt 1 4 DSX 1 Ring IN MUX Port MUX Port OUT DSX 1 Tip 1 lt 2 gt DSX 1 Ring 1 OUT 3 4 M 5 GND Segment 3 OOIS6 System alarm E M 7 Management bus Frame ground E Ma 48V BAT HDSL2 Span Tip E M 9 HDSL2Span Ring Factory use only E M
57. The CSA includes loops up to 12 000 feet of 24 AWG wire or 9 000 feet of 26 AWG wire including bridged taps FEATURES Features specific to the List 4E family of HDSL2 modules include Report menu option for downloading status and performance monitoring data to a file e Enhanced loopback commands controlled by the SmartJack Loopback LPBK option as follows 100 in band loopdown command 100000 1 in 6 in band loopup command e Connection of the HDSL2 span to Loop 2 on pins K and 9 rather than on Loop 1 pins F and 6 e Sources sealing current when connected to an H2TU R 402 List SE or higher Standard features include e HDSL 2 transmission features Lightning and power cross protection on HDSL2 interfaces Full duplex HDSL2 transmission on one pair at 1 552 Mbps Ultra low wander Stratum 1 compliant Grounded loop detection on High bit rate Digital Subscriber Line 2 HDSL2 e Front panel provisioning features Four character status display DS1 splitting and bridge access Status Light Emitting Diodes LEDs RS 232 craft port for connection to a maintenance terminal MODE and LBK pushbuttons e Maintenance screens for inventory provisioning and troubleshooting DS1 and HDSL2 performance monitoring Non volatile performance monitoring Performance Report Messaging PRM support for Supplemental PRM SPRM and Network PRM NPRM at the H2TU R Payload PL and HiGain HG loopback source identification Margin Alarm
58. Time Use the f and 1 arrow keys to select Date and Time then press ENTER Type the date in the format indicated then press ENTER Type the time in the format indicated entering seconds is optional then press ENTER January 9 2002 H2TU C 319 List 4E LTPH UM 1049 02 Issue 2 Setting Circuit ID Numbers Provisioning The Inventory menu provides product information on all units in the system and allows setting of the circuit and unit identification numbers Monitor Performance Event Log Config Report Rlogon Product H2TU C 319 List AE Sw Ver 3 00 Build 10 Checksum 0x604A H2 Xcvr L1 HB2 1 31 Serial 01232456789 CLEI VACHYVYGAA Mfg Date 6 1 2001 Product Information H2TU R H2TU R 402 6E 3 00 25 0x9616 L1 RA2 1 31 0123456789 XXXXXXXXXX 6 1 2001 Circuit and Unit Identifications Circuit ID H2TU R ID Circuit Notes XXXX XXXX XXXX XXXX XXXX XXXX XXXX XXXX 08 01 2001 06 42 07 H2TU C Figure 5 Inventory Screen 1 Press 1 to select the Inventory menu 2 Type the Circuit ID number then press ENTER 3 Type the ID numbers of all other devices listed in the system pressing ENTER after each entry H2TU C 319 List 4E January 9 2002 15 Provisioning Configuring the System LTPH UM 1049 02 Issue 2 The Config menu see Figure 6 below allows you to make the following changes e Standard options see Making Changes to Standard and ADC Options
59. U R DS1 H2TU C HDSL2 or H2TU R HDSL2 then press ENTER 3 Press the SPACEBAR to select the type of statistics Current Alarm History 25 Hour History 48 Hour History or 31 Day History press ENTER after your selection Selecting 31 Day History allows you to clear the Current 25 Hour 48 Hour and 31 Day performance history screens for the selected interface Selecting Alarm History allows you to clear the alarm history screen for the selected interface For information about the DS1 and HDSL2 alarm screens see Table 17 on page 45 4 Press E to clear the screen To clear all history alarm and event log screens 1 Press C to select the Config screen 2 Use the and arrow keys to select Master Clear 3 Press Y to clear all screens H2TU C 319 List 4E January 9 2002 33 Monitoring System Activity and Performance LTPH UM 1049 02 Issue 2 MONITORING SYSTEM ACTIVITY AND PERFORMANCE 34 The H2TU C 319 List 4E provides the following maintenance screens for monitoring system activity and assessing performance The Monitor screens provide a graphical representation of circuit activity and allow initiation of loopbacks The Performance screens provide current 24 hour 48 hour and 31 day performance histories and a continuous alarm history The Event Log provides a description of the 100 most recent events which include their origin time and date of occurrence and message January 9 2002 H2TU C 319 List 4
60. USER MANUAL LLI q ka l Oo rr r 9 N I L4E C Product Catalog H2TU CLEI Code VACHYVYG LTPH UM 1049 02 Issue 2 Revision History of This Manual Issue Release Date Revisions Made October 5 2001 Initial release 2 January 9 2002 BERT update Copyright January 9 2002 2002 ADC DSL Systems Inc All rights reserved Trademark Information ADC is a registered trademark of ADC Telecommunications Inc HiGain is a registered trademark of ADC DSL Systems Inc No right license or interest to such trademarks is granted hereunder and you agree that no such right license or interest shall be asserted by you with respect to such trademark Other product names mentioned in this practice are used for identification purposes only and may be trademarks or registered trademarks of their respective companies Disclaimer of Liability Information contained in this document is company private to ADC DSL Systems Inc and shall not be modified used copied reproduced or disclosed in whole or in part without the written consent of ADC Contents herein are current as of the date of publication ADC reserves the right to change the contents without prior notice Inno event shall ADC be liable for any damages resulting from loss of data loss of use or loss of profits and ADC further disclaims any and all liability for indirect incidental special consequential or other similar dama
61. activated loopback remains active until the LBK pushbutton is pressed which activates the new loopback If neither pushbutton is pressed for a period of 30 seconds and no loopback is in effect the manual loopback session terminates and the display returns to normal mode If any loopback is in effect the 30 second time out is inhibited The active loopback and the manual loopback session continue until the loopback times out in accordance with the LBTO setting Only the SMJK loopback can exist with other network loopbacks at any given time e If there is an active loopback pressing the MODE and LBK pushbuttons for 3 or more seconds terminates any active loopback ends the manual loopback session and returns the display to normal mode To initiate a manual loopback session 1 Press both the MODE and LBK pushbuttons on the front panel for at least 3 seconds The following message appears on the front panel display MAN LPBK NLO H2TU C 319 List 4E January 9 2002 57 Testing LTPH UM 1049 02 Issue 2 2 Press LBK to activate NLOC The display changes to MAN LPBK NLOC 3 Press MODE to advance to the next available loopback e NRE NREM e CRE CREM e CLO CLOC 4 Press LBK to activate the selected loopback The previous loopback is terminated Once a loopback is selected and activated the loopback stays active until it times out based on the LBTO setting When a loopback times out the display then returns to the norma
62. be looped down by either a latching or generic loopback and vice versa All loopback commands are completely symmetric in the FT1 mode If the latching sequence shown in Table 12 on page 26 is interrupted for more than 20 minutes the detection is cleared and the H2TU C reverts back to its initial state where it searches for the initial sequence 1 After a successful latching sequence terminates in a latched loopback state this state remains until the Disable command is detected or until the LBTO option of NONE 20 60 or 120 minutes has expired whichever occurs first The unframed AIS pattern that is normally sent toward the network for a CI LOS fault condition must be replaced by the new patterns listed in Table 13 when the FT1 loopback option is selected Table 13 Response of H2TU C 319 List 4E and H2TU R to LOS and AIS H2TU C Output Pattern FT1 H2TU C 5 H2TU R H2TU R Front Panel Case Option Input Framing Payload FDL Input Output Status Screen Display ENA SF SF 01111110 N A LOS AIS 01111110 RCV ALRM UNFR RLOS RAIS RLOS RAIS XMT IDLE ENA ESF ESF 01111110 X LOS AIS 01111110 RCV ALRM UNFR RLOS RAIS RLOS RAIS XMT IDLE ENA LOS AIS SF 01111110 N A LOS AIS 01111110 RCV ALRM UNFR RLOS RAIS RLOS RAIS XMT IDLE ENA LOS AIS SF PL X SF PL Als RCV LLOS LAIS ALRM LLOS LAIS ENA LOS AIS ESF PL X ESF PL AIS RCV LLOS LAIS ALRM LLOS LAIS a Don t care bit
63. e ee De GE Ee Re ee 48 Report Menu Full Report ass EEN n Eks eg EE se ge sae ths hi beg Be tte TREE ised Deb Een chen Gee E RE nese DEE gee 50 H2TU R LOS and AIS Response Priorities seiiet see se Ge ee ee Se ee GR sE Se Re GR ee ee ee ee ee ee ee ee 54 Eed Summary RA N AE OE EE OE EN EL OO HOE EES 55 Loopback MOdeS EER OR ER RE OE RE OER EE OE OR ONSE EG 60 H2TU C 319 List 4E Card Edge ConnectOr esse see esse se ese es se Gee Ge ee GR ee Re Re eke ee Re Re ee ee ee ee ee ee ee ee 68 HMS 358 Backplane H2TU C 319 List 4E Card Edge Connector Labeling ees see sesse see ese ese ee se ee ee 69 AIS MA Port ME EE N OE N OE AE EE OE N 71 H2TU C 319 List 4E Block Diagram esse se se esse see ge ee ee be Ge RA Re Se ee ee ee ee ee Gee RA Ge GR Se ee 72 H2TU C 319 List 4E January 9 2002 vii List of Tables LTPH UM 1049 02 Issue 2 LIST OF TABLES viii O oo H Dn BUL N amp N N N N N N N HN eRe HA HA e HA e HE HE NY A UN FBP UU Ne DO ONAN Dn FW NY KF O Front Panel Do se EE ER EE EE OE EL OE OE N 4 Front Panel Display Messages ii ee see N ie ee ie sees De tenis cud ete RO EN sot GR Se A ge Ee eaves eg se eg 5 Navigational Keys for the HiGain HDSL2 Maintenance Terminal Screens ssessssssseessseesseresreresrseeseseeees 12 Logon Scre n Menus EE GR te aac eee ee a eek de eee Ie Rance ned eee es 13 H2TU C 319 List 4E Standard Config Menu Options iese sesse see cece se ee Ge ee ee ee Gee RA Ge RA Re Ge ee
64. e terminal screens CLEI and ECI bar code label Provides the human readable Common Language Equipment Identifier CLEI code number and the Equipment Catalog Item ECI bar code number List number Identifies the list number of the H2TU C January 9 2002 H2TU C 319 List 4E LTPH UM 1049 02 Issue 2 Front Panel Table 2 lists the front panel display messages The four character display reports the code of an alarm loopback or diagnostic message and in some cases is followed by a second four character message that modifies the first message with a value or current configuration setting Table 2 Front Panel Display Messages Message ALARM MESSAGES ACO ALRM DBER HBER LA LAIS LLOS LOSW MAL MTA PWR FEED GND PWR FEED OPEN PWR FEED SHRT PRMF PRMN RAIS RLOS RRAI SPNT7 TRCI TUC TUR Full Name Alarm Cut Off Alarm Condition Exists DS1 Bit Error Rate HDSL2 Block Error Rate Loop Attenuation Local Alarm Indication Signal Local Loss of Signal Loss of Sync Word Margin Alarm Metallic Test Access Power Feed Ground Power Feed Open Power Feed Short Performance Report Messaging Far End Performance Report Messaging Near End Remote Alarm Indication Signal Remote Loss of Signal Remote RAI Remote Alarm Indication at the H2TU R Net signal has errors Span Number Transmit RAI CI TX RAI CI Indication Customer Installation at the H2
65. e the MONF setting but operates on the signal received from the equipment e The SPTF setting forces ADS1 to its MUX setting and presents the full VO DS1 facilities payload to the MUX for testing e The SPTE forces ADS1 to its CTHR setting and presents the full DSX 1 equipment signal from the AUX port to the MUX for testing Since both the SPTF and SPTE settings disrupt the original AUX circuit both modes create minor alarm conditions identified as either ALPM SPTF or ALRM SPTE e Cut through CTHR C The CTHR setting of ADS1 disconnects both LIUs from the VO DS1 payload and connects the two LIUS in tandem This allows a DSX 1 circuit from the normal DSX 1 interface typically a HiGain MUX to be cross connected to the external DSX 1 cross connect panel by way of the AUX DSX 1 interface The Equalizer Select option settings apply to either the AUX or MUX port as determined by the 4 setting AUX or MUX of the ADS1 option The equalizer of the unselected port is set to 0 The equalizer settings apply to the AUX port when the Cut Through setting is selected M H2TU C 319 List 4E January 9 2002 31 LTPH UM 1049 02 Issue 2 Provisioning Resetting to Factory Defaults Resetting the H2TU C to its original factory settings may cause interruption of service To reset the H2TU C to its original factory defaults 1 Press C to select the Config menu 2 Use the and arrow keys to select Set Factory Defaults then press ENTER
66. ee se ee ee GR RA GR Se Re ee ee ee ee Re ee 12 The Logon oi EE N etnies itn EE EE EE 12 Provisioning Tasks ES SE EES hatte etwas tenes Te toe cede Ee eae ee 14 Setting Date and Time ieii eee se ee Se Ge ee ee Ge ee Ge Re e ee Ge ee ee ee EEE a ee Rd Ge 14 Setting Citeut ID Numbers sesse esse or ese Eed netted raion eden op Gegee 15 ete TEN EE ER ER RE EE OE DE 16 Clearing the History Alarm and Event Log Screens 0 0 cece see see se ese ee ee ee ee ee ee 33 Monitoring System Activity and Performance 34 Using the Monitor Screen to View System Activity esse see se se es Gee ee ee Ge ee be Gee Ge Re 35 Using the Performance Screens to View Performance Data sesse esse se se ee Se ee Se ee Ge ee ee ee 37 Performance History at the DS 1 Interface esse se se ee ee Ge Ge GR Ge ee Se ee Se ee ee ee 38 Performance History at the HDSL2 Interface e sesse ese esse ese es se se ee Ge GR Ge ee ee ee ee 40 Current Statistics Screens for the DS1 Interface iese se se se cee Se ee ee ee ee ee 42 Current Statistics for HDSL2 Interface esse see see se ee ee cae RA Ge GR Re Ge ee ee ee ee 43 Using the Performance Screens to View Alarm Data esse se see se ee se GR Ge ee Se ee Ge ee ee 44 Alarm History at the DS1 Interface wo eee see se ee se ee ee Ge Re Ge RA Re Re Se ee ee ee ee ee 44 Alarm History at the HDSL2 Interface eee ec ese es se see ee Ge ee GR Se ee ee ee ee ee ee ee 46 Using the System Event Log to Track E
67. eing received Cannot be inhibited at the H2TU R at the H2TU R DS1 input port RRAI Remote Alarm Remote Alarm Indication at the H2TU R Indicates an Cannot be inhibited Indication RAI alarm yellow LED from the CPE with errors from the line unit or network LRAI Remote Alarm Indicates an RAI alarm yellow LED from the CPE Cannot be inhibited Indicator Customer with an error free signal from the line unit or Installation network TRCI Remote Alarm Upon reception of an RAI yellow LED from the Cannot be inhibited Indication Customer CPE the H2TU R sends RAI CI toward the network Installation if the network signal received at the H2TU R is clear If the network signal is impaired LOS AIS or LOF then the RAI is passed on to the network unaltered JOO DBER DS1 Bit Error Rate The DS1 BER has exceeded the set 24 hour Select DIS for the DBER threshold limit of approximately 106 xxx denotes system option either TUC or TUR If TUC and TUR occur at the same time then TUC displays PRMF Performance Report Indicates H2TU R PRM FE BER threshold is Set DBER threshold to DIS Messaging Far End exceeded PRMN Performance Report Indicates H2TU R PRM NE BER threshold is Set DBER threshold to DIS Messaging Near End exceeded Continued 52 January 9 2002 H2TU C 319 List 4E LTPH UM 1049 02 Issue 2 Table 21 Front Panel System Alarms Summary Continued Testing eae Alarm Description To Inhibit Xxx HBER HDSL2 Block Error The HD
68. ges This disclaimer of liability applies to all products publications and services during and after the warranty period January 9 2002 H2TU C 319 List 4E LTPH UM 1049 02 Issue 2 Using This Manual USING THIS MANUAL The following conventions are used in this manual Monospace type indicates screen text e Keys you press are indicated by small icons such as Y or ENTER Key combinations to be pressed simultaneously are indicated with a plus sign as follows CTRL ESC e Items you select are in bold e Three types of messages identified by icons appear in text Notes contain information about special circumstances 2 Cautions indicate the possibility of personal injury or eguipment damage The Electrostatic Discharge ESD symbol indicates that a device or assembly is susceptible to damage from electrostatic discharge gt For a list of abbreviations used in this document refer to Appendix E Abbreviations on page 76 INSPECTING SHIPMENT Upon receipt of the equipment e Unpack each container and inspect the contents for signs of damage If the equipment has been damaged in transit immediately report the extent of damage to the transportation company and to ADC DSL Systems Inc Order replacement equipment if necessary e Check the packing list to ensure complete and accurate shipment of each listed item If the shipment is short or irregular contact ADC DSL Systems Inc as described in Return
69. gnal Loop Attenuation Light Emitting Diode Line Interface Units Local Loss of Signal Loss of Signal Loss of Sync Word Line Power Feed Remote Alarm Indicator Margin Alarm Monitor Equipment Monitor Facilities Monitored Seconds Metallic Test Access H2TU C 319 List 4E LTPH UM 1049 02 Issue 2 Appendix E Abbreviations MTAE Metallic Test Access Equipment TUC Transmission Unit Central Office MTAF Metallic Test Access Facilities TUR Transmission Unit Remote End MUX Multiplexer U N UAS Unavailable Errored Seconds NLOC Network Local Loopback UNFR Unframed NMA Network Management and Administration UUT Unit Under Test NPRM Network PRM NREM Network Remote Loopback OPTIS Overlapped PAM Transmission with Interlocking Spectra P PAM Pulse Amplitude Modulation PRM Performance Report Messaging PRMF Performance Report Messaging Far End PRM FE Performance Report Messaging Far End PRMN Performance Report Messaging Near End PRM NE Performance Report Messaging Near End R RAIS Remote Alarm Indication Signal RLOS Remote Loss of Signal RRAI Remote Alarm Indication SES Severely Errored Seconds SES L Severely Errored Seconds Line SES P Severely Errored Seconds Path SF SuperFrame SMJK SmartJack Loopback SPNn Span Number SPRM Supplemental PRM SPTE Split Equipment SPTF Split Facilities T TRCI TX RAI CI Indication Customer Installation H2TU C 319 List 4E January 9 2002 7
70. gure 31 Loopback Summary e HiGain supports multiple loopbacks but a single loopback is the preferred method Z H2TU C 319 List 4E January 9 2002 55 Testing LTPH UM 1049 02 Issue 2 Generic Loopback Commands The HiGain HDSL2 Generic Loopback GNLB commands allow you to use in band codes to loop up either NLOC 4 in 7 or NREM 3 in 7 towards the network In addition these in band codes loop up CREM 6 in 7 or CLOC 5 in 7 towards the customer Either loopup condition can be terminated looped down with the 3 in 5 SMJK loopdown code All in band codes must be present for at least 5 seconds before the HiGain HDSL2 system responds TLOS is a logic loopback caused by loss of the DS1 input from the CI Figure 31 on page 55 summarizes the available loopbacks in the system and Table 22 on page 56 summarizes the HiGain HDSL2 generic loopback commands See GNLB Test Procedures on page 59 for the test procedures that apply when using the GNLB mode Table 22 Summary of HiGain HDSL2 Generic Loopback Codes and Activation Methods Method of Activation Loopback Code Description Test Set Craft Port MODE LBK NLOC 1111000 DSX 1 signal is looped back to the network at the H2TU C x x 4 in 7 NREM 1110000 DSX 1 signal is looped back to the network at the H2TU R x x X 3 in 7 CLOC 1111100 Signal from the customer is looped back to the customer 5 in 7 at the H2TU R A X X CREM 1111110 Signal from the customer is looped back to
71. hour period between 12 00 00 AM through 11 59 59 PM These thresholds correspond to a 10 BER All PM counters clear to zero at 12 00 00 AM or when Master Clear is selected See Clearing the History Alarm and Event Log Screens on page 33 Table 7 DS1 and DSX 1 24 hour PM Threshold Parameter Threshold Count GVLV o i i o ES L ES P PRM PDVS L 648 SES L SES P 100 UAS P UAS L 10 22 January 9 2002 H2TU C 319 List 4E LTPH UM 1049 02 Issue 2 Provisioning SF RAI to SF RAI Cl Toward Network RACI Option In general the Remote Alarm Indication Customer Installation RAT CT signal is a RAI signal which contains a signature indicating that an LOF or AIS failure has occurred within the customer s network RAI CI is transmitted toward the network when these two conditions are simultaneously true at the point from which RAI CI is originated at the H2TU R toward the network e RAT is received from the CI No LOF LOS or AIS failure is detected in the signal received from the network Since RAI CI meets the definition of RAI it may be detected and used exactly as an RAI For ESF the RAI CI signal is a repetitive pattern with a period of 1 08 seconds RAI Cl is formed by sequentially interleaving 0 99 seconds of the unscheduled message 00000000 11111111 right to left which represents RAI in the DL with 90 milliseconds of the message 00111110 11111111 right to left to flag the signal as RAI CI For SF the SF RAI
72. ion about latching loopback commands refer to BellCore TA TS Y 000077 Issue 3 April 1986 The FT1 option supports both the DDS NI and DDS DSO Data Port DP latching loopback sequences listed in Table 11 Table 11 DDS NI and DSO DP Latching Loopback Sequence Minimum Enable Sequence Number of Bytes Byte Name Network Code 1 35 Transition in Progress TIP 0111010 2A 35 NI Loop Select Code LSC 1000001 2B 35 DSO DP Loop Select Code LSC 0000101 3 100 Loopback Enable Code LBE 1010110 4 35 All Ones 1111111 5 100 LBE 1010110 6 32 Far End Voice FEV 1011010 Disable Loopdown 35 TIP 0111010 The sequences in Table 11 are sent in time slot 1 The S in the Network Code column is a don t care bit The loopback is activated after the detection of Sequence 6 Upon completion of the enable sequence the Test Center continues to transmit FEV bytes in multiples of 20 until FEV confirmation bytes are returned or until about 2 seconds have elapsed If the confirmation bytes are not received a failed attempt is reported Anticipate the minimum number of bytes when the loopback code is transmitted by a preprogrammed machine test pattern generator This minimum number of bytes will most likely be exceeded when the codes are sent manually Also manual testing may inject random data signals between valid control sequences The detection algorithm ignores these occurrences and only responds to valid control codes Table 12 lists the
73. l display mode You can terminate loopbacks manually and exit the MAN LPBK mode by simultaneously pressing the MODE and LBK pushbuttons for 3 or more seconds If no loopback is active the MAN LPBK mode automatically terminates after 30 seconds All loopbacks can be initiated by in band commands in the DS1 payload or by a command from the HiGain HDSL2 system front panel pushbuttons or maintenance screen selections Therefore whenever a loopback is active the method by which it was activated is indicated in the loopback and status information Monitor screen by the annotation HG HiGain HDSL2 or PL Payload adjacent to the identified loopback For example NREM HG indicates that the loopback was initiated by the HiGain HDSL2 system SMJK loopback commands are only activated by in band commands ACTIVATING MANUAL METALLIC TEST ACCESS 58 A Metallic Test Access MTA test mode can be initiated with the front panel MODE and LBK pushbuttons in the same way the manual loopbacks can be initiated This choice is presented at the end of the MAN LPBK sequence of choices To initiate a manual MTA session 1 Press both the MODE and LBK pushbuttons on the front panel for at least 3 seconds The following message appears on the front panel display MAN LPBK NLO 2 Press MODE to advance to the last choice in the following sequence CRE NRE CLO NLO MTA 3 Press LBK to activate the MTA test mode This terminates any
74. le of DS1 performance history screens at the line unit Refer to Table 15 on page 39 for descriptions of the kinds of errors reported on DS1 interface screens Asterisks indicate performance monitoring from the previous day Monitor Event Log Config Inventory Report H2TU R DS1 31 Day History Page 1 ES L SES L UAS L PDVS L ES P SES P UAS P N ext Page P revious Page C l ear History Use lt Space gt to cycle through Interface lfekERE choices and lt Enter gt to view Statistics 31 Day History ID xXXXxX XXXX XXXK XXXX 08 01 2001 07 05 33 H2TU C System OK Figure 16 H2TU R DSI 31 Day Performance History Monitor Event Log Config Inventory Report Rlogon H2TU R DS1 25 Hour History Page 1 of 9 SES L UAS L PDVS L ES P SES P UAS P PRM NE N ext Page P revious Page C l ear History se gt to cycle through Interface lfjeEREN choices and lt Enter gt to view Statistics 25 Hour History ID XXXxX XXXX XXXX xXxxx 08 01 2001 07 05 33 H2TU C Figure 17 H2TU R DSI 25 Hour Performance History January 9 2002 H2TU C 319 List 4E LTPH UM 1049 02 Issue 2 Monitoring System Activity and Performance Monitor Event Log Config Inventory Report Rlogon H2TU R DS1 48 Hour History Page 1 of 4 SES L UAS L PDVS L N ext Page P revious Page C l ear History Use lt Space gt to cycle through Interface PAIESE choices and lt Enter gt to view Statistics 48 Hour History ID XXXxX XXXX
75. maximum power 4 density More favorable conditions would permit increasing the number of shelves per bay without jeopardizing the CO thermal integrity The thermal loading limitations imposed when using the H2TU C in a Controlled Environmental Vault CEV or other enclosures are determined by applying its power parameters to the manufacturer s requirements for each specific housing The 48 Vdc Power Consumption is the maximum total power that the H2TU C consumes or draws from the shelf power source This parameter is needed when the H2TU C is in a location remote to the CO it is serving It determines the battery capacity required to maintain an 8 hour standby battery reserve for emergency situations Battery capacity therefore limits the maximum number of line units which can be installed in a remote enclosure Use the data in Table 26 above to perform this analysis MAXIMUM CURRENT DRAIN The Maximum Current Drain is the maximum current drawn from the shelf power supply when it is at its minimum voltage 42 5 Vdc This determines the shelf fusing requirements Use the 42 5 Vdc current data in Table 26 above to determine the shelf fusing requirements for your particular H2TU C applications 66 January 9 2002 H2TU C 319 List 4E LTPH UM 1049 02 Issue 2 Appendix A Specifications LOOP ATTENUATION INSERTION LOSS AND REACH Each loop has no more than 35 dB of loss at 196 kHz with driving and terminating impedances of 135 as shown in
76. nd reporting of alarms when excessive errors are detected The PM primitive used for this purpose is the CRC checksum performed on the HDSL2 frame for both directions of transmission It is therefore called a block error rate rather than the bit error rate associated with the DS1 interface The CRC errors and counts are displayed on the Monitor screen for both the H2TU C and H2TU R The HBER option allows an alarm to be generated if the total number of CRCs at either the H2TU C or H2TU R exceeds the selected BER threshold during the last 1 minute interval e HBER option 1E 6 Alarm is generated if CRC gt 93 e HBER option 1E 7 Alarm is generated if CRC gt 9 Once initiated the HBER count clears when the CRC count drops below the selected threshold Selecting NONE inhibits this alarm H2TU C Equalization EQL Option Equalization is the configuration of system transmission characteristics within specified limits An adaptive equalizer inserts a frequency shaped loss that corresponds to an equivalent addition of an appropriate cable length By simulating the additional cable loss necessary for correct operation the equalizer compensates for a range of variation in transmission path characteristics Alarm Pattern ALMP Option To improve HiGain HDSL2 compatibility with the switch to protect features used in Digital Loop Carrier DLC feeder applications the H2TU C has an Alarm Pattern ALMP option that allows you to select either an AIS or
77. next configurable parameter After the last parameter has been selected a CONF NO message appears on the front panel display Do one of the following e To cancel the session without saving the requested parameter changes press the MODE pushbutton or do nothing After 30 seconds the display returns to its normal mode without saving the new changes e To accept the requested parameter changes press the LBK pushbutton A CONF YES message displays and the display returns to its normal mode after saving the new changes January 9 2002 H2TU C 319 List 4E LTPH UM 1049 02 Issue 2 Provisioning Resetting to Factory Default Values All user options for the H2TU C described in Table 5 on page 18 can be set to the factory default values using the MODE and LBK pushbuttons To set the user options to their default values 1 Press the LBK pushbutton for 6 seconds until the following message appears DFLT NO Press the LBK pushbutton until the DF LT NO message is displayed The message changes to DFLT YES indicating the factory default values are now in effect and the display returns to the normal mode To terminate the DFLT mode without setting the factory default values do one of the following Press the MODE pushbutton to return to the normal display mode Wait 30 seconds for the unit to return to the normal display mode Displaying System Parameter Settings To scroll through the current settings of all system parameters
78. ng events should occur a The front panel display reports various four character status messages b The H2TU C again attempts communication with a remote unit until a remote unit is detected Verification with an H2TU R Remote Unit If an H2TU R remote unit has been installed 1 Verify that the H2TU C powers up The front panel display illuminates and reports various status messages 2 Verify that the H2TU C attempts to communicate with the remote unit status LED flashes red One of the following occurs Ifthe remote unit is successfully identified and the HDSL2 loop synchronizes the H2TU C status LED lights a steady green The H2TU C reports normal margin messages on the front panel display e If the remote unit is not identified the H2TU C reports four character status messages The H2TU C attempts communication again and reports four character status messages The H2TU C repeats this cycle until a remote unit is detected 3 Verify that a valid DS1 signal has been applied to the H2TU C and the H2TU R e Ifno DS1 signal is being applied to either the H2TU C or the H2TU R inputs then the appropriate DS 1 alarms LLOS or RLOS display on the front panel and the status LED flashes red e Ifa valid DS1 signal is being supplied to the H2TU C and H2TU R then DS1 alarm indications should be absent and the status LED should be a steady green H2TU C 319 List 4E January 9 2002 9 Provisioning LTPH UM 1049 02 Issue 2 PROVISIONIN
79. nk Cyclical Redundancy ESF Number Sequence FPS 2 kps FDL 4 kbps Check CRC Bits 2 kbps 1 m 2 C1 3 m 4 0 5 m 6 C2 7 m 8 0 9 m 10 C3 11 m 12 1 13 m 14 C4 15 m 16 0 17 m 18 C5 19 m 20 1 21 m 22 C6 23 m 24 1 Table 10 SuperFrame Format Frame Bits SF Number Terminal Framing Bit SuperFrame Signaling Bit 1 1 2 0 3 0 4 0 5 1 6 1 7 0 8 1 9 1 10 1 11 0 12 0 H2TU C 319 List 4E January 9 2002 Provisioning 25 Provisioning LTPH UM 1049 02 Issue 2 26 Fractional T1 FT1 Option Fractional T1 circuits can be used in feeder networks to provide frame relay service If such circuits are maintained by a DDS test group then these circuits must respond to DDS DSO latching loopback commands the only tool test groups have at their disposal A latching loopback once it has been initiated by the correct sequence remains locked or latched until the correct loopdown sequence has been detected The FT1 option when enabled allows the H2TU C to respond to DSO latching loopback commands and therefore supports fractional T1 frame relay applications This is in addition to the standard full bandwidth T1 2 in 5 loopup and 3 in 5 loopdown SmartJack commands FT1 supports both the full T1 enable commands and the new DDS latching loopback commands which must also be enabled For more informat
80. ns Monitor BEET Event Log Config Inventory Report Rlogon H2TU R DS 1 Current Statistics 1 Hour 12 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 No PRM Detected No PRM Detected 0 0 1801 J Press C l ear Current Statistics Use lt Space gt to cycle through Interface H2TU R DS 1 choices and lt Enter gt to view Statistics ID xxXXxX XXXX XXXK XXXX 08 01 2001 07 05 33 H2TU C System OK Figure 22 H2TU R DS1 Current Statistics Monitor ETE Event Log Config Inventory Report Rlogon H2TU C DS 1 Current Statistics 1 Hour 12 00 O OOOOOOO GOOLGOOOT OOS DO SY 1 Use Space to cycle through Interface H2TU C DS 1 choices and lt Enter gt to view Statistics ID xXXxX XXXX XXKK XXXX 08 01 2001 07 05 33 H2TU C System OK Figure 23 H2TU C DS1 Current Statistics 42 January 9 2002 H2TU C 319 List 4E LTPH UM 1049 02 Issue 2 Monitoring System Activity and Performance Current Statistics for HDSL2 Interface Figure 24 shows statistics for the HDSL2 interface at the H2TU C This screen reports 1 day 1 hour and 15 minute statistics Refer to Table 16 on page 41 for descriptions of the kinds of errors reported on this screen Monitor RSME Event Log Config Inventory Report Rlogon H2TU C HDSL2 Current Statistics Margin dB 16 15 Use lt Space gt to cycle through Interface H2TU C HDSL2 choices and lt Enter gt to view Statistics ID xXXxX
81. oned non loaded copper pair e Conventional inline DS1 repeaters are no longer required e Cable pair conditioning pair separation and bridged tap removal are not required Each loop has no more than 35 dB of loss at 196 kHz with driving and terminating impedances of 135Q In general HiGain HDSL2 systems Operate effectively in the same cable binder group with other HDSL2 lines HDSL T1 ADSL SDSL POTS DDS and other transmission schemes e Can be used with customers requiring DS1 service on a temporary or permanent basis e Provide a means of quickly deploying service in advance of fiber optic transmission systems 2 January 9 2002 H2TU C 319 List 4E LTPH UM 1049 02 Issue 2 Front Panel FRONT PANEL Figure 1 shows the H2TU C 319 List 4E front panel Table on page 4 describes the front panel components For pinout diagrams of the H2TU C 319 List 4E card edge connector and craft port refer to Appendix A Specifications on page 65 Front panel display System option pushbuttons Card handle CLEI code and ECI bar code label on outside of handle DSX 1 access jacks Craft port Figure 1 H2TU C 319 List 4E Front Panel H2TU C 319 List 4E January 9 2002 3 Front Panel LTPH UM 1049 02 Issue 2 Table 1 Front Panel Description Front Panel Feature Front panel display Function Displays four character status provisioning and alarm s
82. ons including those that are used to transport Stratum 1 timing GROUND FAULT DETECT The H2TU C has a Ground Fault Detect GFD circuit which detects a ground or a resistive path to ground on any wire of the HDSL2 loop This makes the product compliant with the Class A2 requirements of GR 1089 H2TU C 319 List 4E January 9 2002 73 Appendix C Compatibility LTPH UM 1049 02 Issue 2 APPENDIX C COMPATIBILITY 74 The HiGain HDSL2 system uses HDSL2 transmission technology as recommended by ANSI committee in compliance with the August 1999 T1 E1 4 99 006R5 HDSL2 standards The H2TU C are designed to mount in the following shelves with 3192 mechanics ADC HMS 317 28 slot 23 inch shelf ADC HHS 319 3 slot 19 inch horizontal shelf ADC HMS 308 8 slot remote enclosure Charles Ind 3192 28 slot connectorized Charles Ind 3192 WR 28 slot wire wrap Charles Ind 343 00 12 to 14 slot wire wrap Charles Ind 319 02 22 slot connectorized Charles Ind 319 04 22 slot wire wrap Charles Ind 340 00 9 slot to 11 slot wire wrap Larus 1185 28 slot connectorized Charles Ind 343 00 and 340 00 shelves do not support the H2TU C System Alarm output on pin H Also if slots 1 and 2 of these shelves were wired for the 3408 Fault Locate unit they must be rewired to accept the H2TU C January 9 2002 H2TU C 319 List 4E LTPH UM 1049 02 Issue 2 Appendix D Product Support APPENDIX D PRODUCT SUPPORT ADC Customer
83. ont panel display codes Table 6 on page 19 describes the ADC Config screen options and lists their front panel display codes Selections in bold typeface are the factory default settings Table 5 H2TU C 319 List 4E Standard Config Menu Options Front Panel Standard Config nae Menu Options Display Selection Description Code Loopback Timeout LBTO NONE Disables automatic time out cancellation of all loopbacks 20 Sets automatic cancellation of all loopbacks to 20 minutes after initiation 60 Sets automatic cancellation of all loopbacks to 60 minutes after initiation 120 Sets automatic cancellation of all loopbacks to 120 minutes after initiation Loop Attenuation LATT 0 through Determines the maximum loop attenuation before an alarm is declared Zero Threshold 40 dB disables the alarm The loop attenuation threshold can only be set through the maintenance screens 32 dB Default value Zero disables the alarm Margin Threshold MARG 0 to 15 dB Determines the minimum allowable margin below which a system alarm can occur Zero disables the alarm The Margin Alarm Threshold can only be set through the maintenance screens 5 dB Default value DS1 Frame FRMG AUTO Configures the line unit to operate in an auto framing AUTO mode Formatting It detects and locks to both SF or ESF DS1 frame patterns Line and path performance parameters are maintained and displayed Unframed payloads will cause the ES P and SES
84. op attenuation threshold crossed on any HDSL2 interface HDSL2 margin alarm threshold crossed on any HDSL2 interface HDSL2 unavailability begins ends on any segment Master zero reset NTWK DBER alarm 1 day threshold crossed of any PM data NTWK DS1 LOS begins ends NTWK PRM FE BER alarm at the remote only 1 day threshold crossed of PRM FE trouble on NTWK far end NTWK DS1 AIS begins ends Power Feed Open begins ends Power Feed Short begins ends RAI begins ends TX RAI CI begins ends RAI CI sent from the remote towards the network H2TU C 319 List 4E January 9 2002 49 Monitoring System Activity and Performance LTPH UM 1049 02 Issue 2 USING THE REPORT MENU 50 The Report menu Figure 29 provides screens containing status and performance monitoring data for line and remote units which can be downloaded to a file for analysis or future reference Table 20 on page 51 describes the four types of reports provided by the Report menu To select each individual report do the following 1 2 Press O to select Report menu Press the SPACEBAR to select a report Use your terminal emulation software HyperTerminal or Procomm to capture the selected report to your printer Press ENTER to generate End the captured report Press CTRL IR to refresh the Report menu screen Monitor Performance Event Log Config Inventory Report Report Type RRRRIN clea Please select repo
85. or the return H2TU C 319 List 4E January 9 2002 75 Appendix E Abbreviations APPENDIX E ABBREVIATIONS A ACO ACON ACQ ADSI AIS ALRM AMI AUX AWG B8ZS BER BPVT BRG CLEI CLOC CO CREM CSA CTHR DBER DDS DLC DSX 1 ECI ES ESD ESF ES L 76 Alarm Cutoff Auto Conversion of DS1 frame Acquisition Active DSX 1 Alarm Indication Signal Alarm Condition Alternate Mark Inversion Auxiliary American Wire Gauge Bipolar with 8 Zero Substitution Bit Error Rate Bipolar Violation Transparency Bridge Common Language Equipment Identifier Customer Local Loopback Central Office Customer Remote Loopback Carrier Service Area Cut through DS1 Bit Error Rate Digital Data Service Digital Loop Carrier DS1 Cross Connect Frame Equipment Catalog Item Errored Seconds Electrostatic Discharge Extended SuperFrame Errored Seconds Line ES P EXZ FCON FERR FLDL GFD H LTPH UM 1049 02 Issue 2 Errored Seconds Path The occurrence of 8 consecutive zeroes for B8ZS or 16 for AMI Framed Conversion of DS1 frame Framing Bit Error Flash Download Ground Fault Detect H2TU R HiGain HDSL2 Remote Unit HBER HCDS LA LAIS LATT LED LIU LLOS LOS LOSW LPF LRAI M MAL MONE MONF MSEC MTA January 9 2002 HDSL2 Block Error Rate High Capacity Digital Service Identification Loop Attenuation Line Alarm Indication Si
86. oth the DSX 1 and the H2TU C If separate plugs are inserted into both LINE jacks with the other end disconnected the BRG jacks can be used to send and receive test patterns toward the DSX 1 The AUX DSX 1 port has no resident test jack access Es The equalizer settings only apply to the specific DSX 1 port selected by the ADS1 option MUX or AUX The unselected port defaults to an equalizer setting of zero GNLB Test Procedures Figure 32 on page 60 is a graphical representation of the various loopback configurations with the associated GNLB commands shown Table 22 on page 56 for a description of these commands To perform the GNLB loopback test procedure 1 Have the CO tester send the NREM 3 in 7 in band loopup code for 5 seconds You should be able to observe the NREM message on the front panel display The Status LED on the front panel should be green and the loopback mode should also be identified on the Monitor screen 2 Have the CO tester transmit a DS1 test signal toward the H2TU C and verify that the returned looped signal to the test set is error free If Step 2 fails have the CO tester transmit the 3 in 5 in band loopdown code 4 Have the CO tester send the NLOC 4 in 7 in band loopup for 5 seconds You should be able to observe the NLOC message on the front panel display The Status LED on the front panel should be yellow and the loopback mode should also be identified on the Monitor screen 5 Repeat Step 2 If the te
87. pendix A Specifications LTPH UM 1049 02 Issue 2 POWER CONSUMPTION The three most important power parameters of an H2TU C are its maximum power consumption maximum power dissipation and maximum current drain Table 26 describes line powered circuits on 9 kft 26 AWG loops without a regenerator Table 26 H2TU C 319 List 4E Power Parameters 48 Vde Power Heat Dissipation 42 5 Vde Current Consumption Watts mA Watts Remote Power Source Maximum Maximum Maximum Line powered 12 25 7 25 292 0 Local powered with Sealing Current 8 7 6 75 207 0 MAXIMUM POWER DISSIPATION The Maximum Power Dissipation measures the power that is converted into heat that builds up within the unit It contributes to the total heat generated in the space around the unit It is used to determine the maximum number of fully loaded shelves per bay that does not exceed the maximum allowable power dissipation density in watts per square foot to comply with GR 63 In COs the maximum power dissipation for open faced natural convection cooled mountings is limited to 134 7 watts per square foot per GR 63 CORE The footprint of a standard 28 slot 23 inch HMS 317 shelf is 7 024 square feet Therefore the maximum bay dissipation is limited to 946 watts Use this limit and the parameters in Table 26 to determine the maximum number of H2TU C circuits that can occupy one CO bay e This is a worst case situation since it assumes the entire CO is subjected to the
88. r output levels of the H2TU C network unit towards the Network customer to comply with the Default template as defined in Section 6 1 4 2 of ANSIT1 E1 4 ENH Configures the power output levels of the H2TU C network unit towards the customer to comply with the Enhanced template as defined in Section 6 1 4 2 of ANSIT1 E1 4 Continued 18 January 9 2002 H2TU C 319 List 4E LTPH UM 1049 02 Issue 2 Provisioning Table 5 H2TU C 319 List 4E Standard Config Menu Options Continued Standard Config Menu Options Power Back Off Customer Selection Front Panel Display Code PBOC DEF ENH Description Configures the power output levels of the H2TU R network unit towards the network to comply with the Default template as defined in Section 6 1 4 2 of ANSIT1 E1 4 Configures the power output levels of the H2TU R network unit towards the network to comply with the Enhanced template as defined in Section 6 1 4 2 of ANSIT1 E1 4 Table 6 H2TU C 319 List 4E ADC Config Menu Options A Front Panel ae Menu Display Selection Description p Code Line Power Feed PWRF OFF Disables powering to the HDSL2 pair ON Keeps the HDSL2 line voltage at nominal 185 Vdc Remote Provisioning RTPV ENA Enables remote provisioning DIS Disables remote provisioning Bipolar Violation BPVT ENA Enables BPVs and HDSL2 CRC errors at the DS1 input to be converted into Transparency DS1 BPVs at the DS1 output at the distant end This make
89. relationship between the latching loopback sequences and the specific HiGain HDSL2 loopback they initiate Table 12 HiGain HDSL2 Loopback vs Latching Sequence HiGain HDSL2 Loopback Latching Sequence NREM 1 2A 3 6 NLOC 1 2B 3 6 The NLOC loopback is called tandem DSO DP loopback It is used to select one of many loopback points when there are several identical data ports in tandem The NI loopback is assigned to the H2TU R NREM since it is usually located at the Network Interface NI The DSO DP tandem loopback is assigned to the rest of the HiGain HDSL2 loopbacks because most DDS test sets support this tandem command set The Test Center transmits a group of 40 TIP bytes to loop down the loopback It continues to transmit TIP bytes in multiples of 20 until the TIP bytes are not returned or until about 2 seconds have elapsed If the bytes are absent January 9 2002 H2TU C 319 List 4E LTPH UM 1049 02 Issue 2 Provisioning a successful loopdown is reported otherwise a failed loopdown is reported The loop down can also be initiated by depressing the H2TU R loopback control button or by any of the standard 3 in 5 loop down commands The implemented detection release loopback algorithm functions properly in the presence of a 10 bit error rate Since the FT1 mode is a combination of both the full T1 and the latching loopback modes all codes are always active Therefore if a loopback is initiated by a latching sequence it can
90. rt type by pressing lt Space gt then start terminal logging and press lt Enter gt to generate the report ID XXXX XXXX XXXX Figure 29 Report Menu Full Report January 9 2002 H2TU C 319 List 4E LTPH UM 1049 02 Issue 2 Monitoring System Activity and Performance Table 20 Report Types Type Contains the following information Full Report e Circuit and unit identifications e Product information e System configuration e Current performance statistics e Alarm history e Performance history e System event log Short Report e Product information e System configuration e Current performance statistics e Circuit and unit identification System Information Report Circuit and unit identifications e Product information e System configuration Event Report e Circuit and unit identifications e Product information e System event log H2TU C 319 List 4E January 9 2002 51 Testing TESTING LTPH UM 1049 02 Issue 2 This section provides information about front panel system alarms LOS and AIS response OCTSS test procedure and loopback testing SYSTEM ALARMS Table 21 summarizes all possible system alarms in order of priority as they appear on the front panel When multiple alarms occur the front panel display only reports the highest priority alarm The alarm history screens display alarms also but provide greater detail see Using the Performance Screens to View Alarm Data on page 44 All alarms
91. s on page 75 If you must store the equipment for a prolonged period store the equipment in its original container H2TU C 319 List 4E January 9 2002 iii Inspecting Shipment LTPH UM 1049 02 Issue 2 iv January 9 2002 H2TU C 319 List 4E LTPH UM 1049 02 Issue 2 Table of Contents TABLE OF CONTENTS Overview 1 Features OE EE OE OK EE EO IE Oe 1 Erin esel SE RE OE RE OR EN EE 2 Applications EE a SE EE Ge Re Aa de EG eee ae RR eh Se 2 Front Panel 3 Installation 8 MS slae UR RE EE HERE EE EE 9 Verification without an H2TU R Remote UNIE sesse see sesse se se se ee ee Ge ee ee ee 9 Verification with an H2TU R Remote UNIE iese sesse ese see see se ee Ge Re GR Ge Re GR ee ee ee ee 9 Provisioning 10 Using the MODE and LBK Pushbutton e ees see see se se ese ee ee ee Ge RA GR RA GR GR Re Re Re Ge ee ee ee ee ee 10 Setting Options through MODE and LBK ees sees ce se ee ee se ee ee ee Ge Ge ke 10 Resetting to Factory Default Values sesse se ese ee ee ee ee GR Ge ee ee ee ee ee ee 11 Displaying System Parameter SettingS iese eee ee se ee ee ee ee Ge GR ee ee Ge ee ee ee 11 Disabling an Alarm EE Er EE Re chase vee pea OGE Ge node EDE EER Gee GE Ee ee ee ed 11 Loopback Modes REEDE EE iti ives ek vet ons Lev an ek Oe eee aa Ren Ve ee E 11 Using a Maintenance Terminal se se se ee se ee Ge Ge Ge GR GR GR Re Ge Se ee ee Re Ge RA Ge RR Re ee 12 Connecting to a Maintenance Terminal iese s
92. s and on the number of frame bits contained in the block of 231 error bits The H2TU R and H2TU C generate this bit pattern in a series of discontinuous bursts containing 20 bit errors each excluding frame bits Those test sets that do not count frame error bits as data bit errors will indicate fewer bits than the H2TU R and H2TU C transmit for a Cl and NI loopback The H2TU R is assigned the ILR 2 loopback code It responds with 20 bit errors excluding the frame bits The IOR Power Down code must remain present for the duration of the powerdown mode When this code is removed the HiGain system returns to its normal unlooped and unarmed state ER OO Sw H2TU C 319 List 4E January 9 2002 61 Testing LTPH UM 1049 02 Issue 2 To perform the A2LB test procedures 1 Send the in band Arming and NI LPBK code 11000 to the H2TU C for at least 5 seconds 2 Monitor the output of the H2TU C for the return of the pattern Return of the pattern indicates one of the following e The H2TU R has looped up if the SMJK Loopback option is enabled e Anexternal NID has looped up if the SMJK Loopback option is disabled and the H2TU C and H2TU R have been armed 3 Verify if possible that the H2TU R Loopback LED is either flashing yellow at 4 second intervals indicating that the system is armed or is a steady yellow indicating that it is both armed and in SMJK loopback The H2TU C Status LED also flashes yellow when the system is armed
93. s HiGain HDSL2 See Bipolar transparent to BPVs Violation DIS Disables BPV Transparency Transparency BPVT Option on page 22 DS1 BER Threshold DBER ENA Enables the fixed 24 hour DS1 BER threshold See DS1 BER DIS Prevents the generation of a system alarm due to DS1 BER DBER Option on page 22 HDSL2 BER HBER 1E 6 System alarm relay contact closes and the Status LED flashes red when the Threshold Block Error Rate BER exceeds 10 See HDSL2 BER 1E 7 System alarm relay contact closes and the Status LED flashes red when BER Threshold HBER exceeds 107 Option on page 22 and System Alarm NONE Prevents generation of a system alarm due to BER Output Pin on page 70 Special Loopback SPLB GNLB Configures the HiGain HDSL2 system to respond to the generic in band Mode loopback codes A2LB Configures the HiGain HDSL2 system to respond to the in band loopback codes of the Teltrend addressable repeater A3LB Configures the HiGain HDSL2 system to respond to the in band loopback codes of the Wescom addressable repeater A4LB Configures the HiGain HDSL2 system to respond to the in band loopback codes of the Wescom Mod 1 addressable repeater SmartJack Loopback LPBK ENA Enables the HiGain HDSL2 system to recognize all in band SmartJack loopback commands DIS Configures the HiGain HDSL2 system to ignore all in band SmartJack loopback commands H2TU C 319 List 4E Continued January 9 2002 19 Provisioning LTPH U
94. s and CPE disconnect or trouble indications Continued January 9 2002 H2TU C 319 List 4E LTPH UM 1049 02 Issue 2 Provisioning Table 6 H2TU C 319 List 4E ADC Config Menu Options Continued ADC Config Menu Options Active DS1 Port See Dual DSX 1 Port Option on page 31 H2TU C 319 List 4E Front Panel Display Code ADS1 Selection MUX AUX CTHR Description The MUX mode selects the DSX 1 MUX port as the active source for the DS1 Signal to transmit to the HSDL Line Port 1 An AIS signal is sent to the auxiliary Port 2 Equalizer settings apply to the MUX DSX 1 port The AUX equalizer is set to 0 The AUX mode selects the auxiliary DSX 1 Port 2 as the active source for DS1 signal to transmit to the HDSL Line Port In this case the MUX port is used as a monitor or splitting device for electrical test access Equalizer settings apply to the AUX DSX 1 port The MUX equalizer is set to 0 Activates the Cut through mode This mode electrically connects the MUX port to the AUX port and the H2TU C operates as a cut through card This is used when one tributary from the Wideband 3190 MUX card is required to appear at the DSX 1 interface to the local central office Equalizer settings apply to the MUX DSX 1 port The AUX Equalizer is set to 0 January 9 2002 21 Provisioning LTPH UM 1049 02 Issue 2 HDSL2 BER Threshold HBER Option The HBER option permits the monitoring of loop integrity a
95. s controlled by the following three settings of the Active DSX 1 ADS1 user options MUX M In the MUX setting the I O DS1 payload from the field is connected to the MUX LIU which connects it to the MUX IN and OUT DSX 1 signal levels at the S3 card edge connector interface This interface connects to one of the HiGain M13 multiplexers that plugs into the HMS 358 shelf An AIS out of service indicating pattern is sent toward the Auxiliary LIU for the MUX setting Additionally the input port of the AUX LIU is monitored for a valid DS1 signal and an AUX LOS alarm is displayed if no signal is present AUX A The AUX setting of the ADS1 option routes the I O DS1 payload to the AUX LIU This LIU converts the payload to the IN and OUT signal levels at the AUX DSX 1 output pins at S1 of the card edge connector which provides access to an external DSX 1 cross connect panel The AUX setting of ADS 1 also supports a subset of four more user options if the MUX DSX 1 interface is connected to a HiGain MUX These four options which can only be initiated from the shelf s HMU 319 management card are called Monitor Facilities MONF Monitor Equipment MONE Split Facilities SPTF and Split Equipment SPTE and are described as follows The MONF setting routes the signal received from the facilities at the VO DS1 payload interface to the MUX through the MUX LIU where it can be examined by the MUX test circuits The MONE setting operates lik
96. s of the H2TU C and H2TU R or the H2TU C and first regenerator are trying to establish synchronization over the HDSL2 loop of Span 1 ARM HiGain System Armed Armed to respond to Intelligent Repeater Loop ILR codes BAD RT No Response from H2TU R The H2TU C receives no response from the H2TU R and all HDSL2 loop conditions are normal Therefore the integrity of the H2TU R or the HDSL2 loop is questionable FERR Framing Bit Error Occurred Framing bit error occurred at H2TU C DSX 1 input FLDL Flash Download Flash download of firmware upgrades Contact Customer Service for upgrade procedures see Appendix D Product Support on page 75 HES HDSL2 CRC Error H2TU C HDSL2 Loop Cyclical Redundancy Check CRC error LBPV Local Bipolar Violation A bipolar violation has been received at the DSX 1 input to the H2TU C M xx HDSL2 Loop Margin Indicates the power of the received HDSL2 signal relative to noise S N with respect to 21 5 dB Any value of 6 dB or greater is adequate for reliable system operation MNGD Managed The H2TU C is under control of the HMU 319 Network management PWR FEED OFF PWR FEED ON SIG Power Feed Off Power Feed On Signaling unit In this state the front panel craft port and pushbuttons are disabled HDSL2 span power has been turned off by setting the PWFD option to off or HDSL2 span power has been turned off by use of the A2LB Intelligent Office Repeater IOR Power Down code Indicates that the HDS
97. s signals to the far end PM NIU at the network boundary that frame conversion is requested If the far end PM NIU is capable of conversion it changes the framing to ESF If not then the H2TU R reverts to SF and does not apply any conversion If an ESF is received from the CPE it is passed on to the network and the network s inbound framing is passed on to the CPE e FCON This is the forced conversion setting Table 8 below lists the HiGain HDSL2 responses to both the ACON and FCON settings for the CONV option The responses are identical except in cases 3 and 4 In these cases the FCON reply is attempting to force the network or the far end PM NIU to send ESF It also alerts the CPE with an AIS alarm pattern while forcing the ESF to the network Continuity is maintained as for ACON Table 9 on page 25 and Table 10 on page 25 list the ESF and SF frame formats respectively Table 8 Response to H2TU R DSI Frame Conversion Options ACON Option FCON Option Case Number NET Transmit CPE Transmit NET gt CPE NET gt CPE NET lt CPE NET lt CPE 1 ESF SF ESF SF ESF SF ESF SF ESF lt SF 2 ESF ESF ESF ESF ESF ESF ESF lt ESF ESF lt ESF 3 SF ESF SF SF SF AIS ESF lt ESF ESF lt ESF 4 SF SF SF SF SF AIS SF SF ESF lt SF 24 January 9 2002 H2TU C 319 List 4E LTPH UM 1049 02 Issue 2 Framing Pattern Table 9 Extended SuperFrame Format Frame Bits Frame Bit for Datali
98. sarming code IR LPDN or DISARM ESF Data Link 1111 1111 0010 0100 FF24 Disarming code IOR LPBK NLOC or CREM 1101 0011 1101 0011 D3D3 NLOC DSX 1 signal is looped back to the network at 230 232 bit errors the H2TU C 229 231 bit errors CREM Signal from customer is looped back to the customer at the H2TU C ILR 2 LPBK NREM or CLOC 1100 0111 0100 0010 C742 NREM DSX 1 signal is looped back to the network at 20 bit errors the H2TU R CLOC Signal from customer is looped back to the customer at the H2TU R Loopback Description IR LPDN except SMJK 1001 0011 1001 0011 9393 Loopdown H2TU C or H2TU R IR QUERY LPBK Query loopback IR ALTERNATE QUERY LPBK Alternate query loopback TIME OUT OVERRIDE 1101 0101 1101 0110 D5D6 Loopback time out override FAR END NI ACTIVATE 1100 0101 0101 0100 C554 Unblock AIS IOR POWER DOWN H2TU C Removes HDSL2 line power a The leftmost bit arrives first in all sequences The detection algorithm functions reliably with a random 10 Bit Error Rate BER on the facility The entire arming and loopback sequence can also be initiated at the remote H2TU R location b The H2TU R identifies CREM and the H2TU C identifies NLOC with 231 bit errors excluding the frame bits When framed data is being sent in the AUTO framing mode the number of the 231 bit errors detected by the test set varies from 229 to 231 depending on whether or not the test set counts frame errors as bit error
99. st UUT to be tested from its DSX 1 interface on the simulated test circuit This allows any problem to be isolated to either the equipment or the facilities Since this MTA test event disrupts service it is always accompanied by an MTA LOSW alarm that is displayed on both the front panel and status screen Simultaneous access of the MTAF and MTAE backplane buses by more than one H2TU C would connect two loops and two transceivers together and must be prevented Such a conflict is inhibited when the shelf is under command of the HMU 319 management unit However when the H2TU Cs are under manual control the conflict can occur if the MTA command is issued to two line units in the same shelf or in different shelves if the TB3 and TB6 ports are bussed together to create a single test access to an entire bay Therefore the user must be aware of this potential conflict and take care to avoid it Figure 10 on page 29 shows a future enhancement of the H2TU C that uses separate commands to control the two test relays K1 and K2 This allows the IN and OUT ports of TB6 to be connected to each other which creates a circuit that allows a suspected H2TU C to be replaced by a standby H2TU C The MTAF relay K1 D is activated in the defective H2TU C unit and the MTAE relay K2 S activated in the standby H2TU C unit This allows the original facility circuit of the defective H2TU C to be connected by way of the TB6 jumpers to the standby H2TU C unit The test center can
100. st passes the problem is in the downstream direction If it fails the problem is in the upstream direction H2TU C 319 List 4E January 9 2002 59 Testing DSX 1 60 1111110 HDSL2 SPAN HDSL2 SPAN HDSL2 SPAN HDSL2 SPAN HDSL2 SPAN HDSL2 SPAN 1000000 11000 1110000 Loopbacks Toward Customer 1111100 Set the NLBP option to AIS to send AIS indicated by an all ones pattern for any network loopback t A3LB and A4LB loopback codes A2LB loopback code 4 GNLB loopback codes Figure 32 Loopback Modes January 9 2002 LTPH UM 1049 02 Issue 2 Loopbacks Toward Network All ones 1 in 6 All ones All ones All ones Cl Customer Interface H2TU C 319 List 4E LTPH UM 1049 02 Issue 2 Testing A2LB Test Procedures Using the codes listed in Table 23 a network tester can activate NLOC or NREM loopbacks or SMJK if enabled A tester at the customer premises can activate CLOC or CREM loopbacks All loopbacks shown in Table 23 can also be initiated from the H2TU C front panel MODE and LBK pushbuttons see Setting Options through MODE and LBK on page 10 Table 23 Addressable Repeater Loopback Commands A2LB Binary Code 2 Hexadecimal Equivalent ARMING or NI LPBK in band 11000 11000 Arming code ARMING or NI LPBK ESF Data Link 1111 1111 0100 1000 FF48 Arming code IR LPDN or DISARM in band 11100 11100 Di
101. t Frame Type HDSL2 ES Count HDSL2 SES Count HDSL2 UAS Count LA LPF M MAL HG or PL PRM System Status Description An active loopback is indicated on the lower third of the Monitor screen Available loopbacks are indicated by gray text See Table 22 on page 56 for a summary of the HiGain HDSL2 generic loopback codes and activation methods Indicates type of alarm Indicates system is in an armed state and ready for an intelligent repeater IR loopback command Type of DS1 line coding used B8ZS or AMI Errored Seconds The sum of the Errored Seconds Line ES L and Errored Seconds Path ES P counts detected on the DS1 input over a 24 hour period Errors included are DS1 frame errors BPV and ESF CRC errors Severely Errored Seconds The sum of the DS1 Severely Errored Seconds Line SES L and Severely Errored Seconds Path SES P counts over the last 24 hours Unavailable Errored Seconds The number of seconds during which the DS1 input signal was absent over a 24 hour period Type of DS1 framing used on the input stream SF ESF or UNFR Errored Seconds The number of 1 second intervals that contained at least one CRC or LOSW error This value is a running total of the last 24 Hours Severely Errored Seconds The number of 1 second intervals that contain at least 50 CRC errors or one or more LOSW defects An LOSW defect occurs when at least three consecutive HDSL frames contain one or more frame bit
102. tes that there are no alarms present System Alarm indicates the presence of an alarm Refer to Using the Performance Screens to View Alarm Data on page 44 36 January 9 2002 H2TU C 319 List 4E LTPH UM 1049 02 Issue 2 Monitoring System Activity and Performance USING THE PERFORMANCE SCREENS TO VIEW PERFORMANCE DATA The Performance screens display e CRC statistics for the HDSL2 or DS1 interface in 31 day 48 hour 25 hour and current history reports e Alarm statistics for the DS1 interfaces Figure 25 on page 44 and Figure 26 on page 45 or DS1 interfaces Figure 26 on page 45 on a continuous basis To access the performance history screens 1 Press P to select the Performance screen 2 Press the SPACEBAR to select an interface H2TU C DS1 H2TU R DS1 H2TU C HDSL2 or H2TU R HDSL2 then press ENTER 3 Press the SPACEBAR to select the type of statistics Current Alarm History 25 Hour History 48 Hour History or 31 Day History then press ENTER H2TU C 319 List 4E January 9 2002 37 Monitoring System Activity and Performance LTPH UM 1049 02 Issue 2 Performance History at the DS1 Interface 38 The Performance History for the DS1 interface provides 31 day 48 hour 25 hour and current statistics screens for the H2TU C and the H2TU R as viewed from the H2TU C Figure 16 below and Figure 17 on page 38 are examples of DS1 performance history screens at the remote unit Figure 18 on page 39 is an examp
103. that are not inhibited will drive the front panel Status LED to a flashing red alarm state Table 21 Front Panel System Alarms Summary Front Panel Message PWR FEED SHRT Alarm Power Feed Short Description A short exists between the Tip and Ring of the HDSL2 pair To Inhibit Cannot be inhibited PWR FEED GND Power Feed Ground The HDSL2 loop is grounded Cannot be inhibited PWR FEED OPEN Power Feed Open A line power open condition exists Cannot be inhibited LOSW Loss of Sync Word The HDSL2 loop has lost synchronization Cannot be inhibited MTA Metallic Test Access The H2TU C is in its MTA LOSW test state Sets MTA option to disabled SPTE Split Equipment A test mode initiated by the HMU which splits the Sets ADS1 option to MUX or AUX port s DSX 1 payload and sends it to the MUX CTHR port SPTF Split Facilities A test mode initiated by the HMU which splits the Sets ADS1 option to MUX or facility DS1 payload from the AUX port 1 and sends CTHR it to the MUX port LLOS Local Loss of Signal Loss of the DSX 1 input signal Cannot be inhibited RLOSO Remote Loss of Signal Loss of the H2TU R DS1 input signal Cannot be inhibited LAIS Local Alarm Indication Indicates an AIS all ones pattern is being received Cannot be inhibited Signal at the H2TU C input port RAIS Alarm Indication Signal Indicates an AIS all ones pattern is b
104. the following alarms e LOSW on any loop e LOS DS1 Retiring System Alarms To retire a system alarm press the LBK pushbutton and execute an Alarm Cutoff ACO An ACO turns the alarm off and replaces the ALRM message with an ACO message The second part of the ALRM message which defines the cause of the alarm remains Both parts of the message remain until the alarm condition clears or another higher priority alarm occurs H2TU C 319 List 4E January 9 2002 53 Testing LTPH UM 1049 02 Issue 2 Remote LOS and AIS Response Figure 30 shows the differing ways the H2TU R can respond to the network depending on the configuration of the TLOS NLBP FT1 ALMP and NAIS configuration options described in Table 5 on page 18 and Table 6 on page 19 See Table 13 on page 27 for the response of the H2TU C and H2TU R to LOS and AIS alarm conditions YES NO ENA Loopback to Network DIS LOS Cea Coe e 7 pattern ENA FT1 idle to NET amp CPE DIS ADC Option LOS Standard Option Pass on LOS to NET AIS Default configurations are in bold O CI Figure 30 H2TU R LOS and AIS Response Priorities OCT55 TEST PATTERN WITH AMI LINE CODE The OCTS5 test pattern can be used in unframed mode to stress the system and verify data integrity In an SF or ESF framing mode excessive zero anomalies may occur which causes the H2TU C to report ES SES and UAS errors according to ANSI T1 231 1997 54 January 9 2002 H2TU
105. then switch the DSX 1 interface from the defective H2TU C unit to the standby unit within a DACS or M13 MUX circuit to complete the test circuit To external DSX 1 Port2 1 cross connect Bac panel xa ON MCQM ADS1 Option control aO lt O0ON D9 34 N FOUI o0oNn vcom 0 0 00 30 00 XCZ M MUX or SPTF MONF Monitor Facilities A Auxiliary MONE Monitor Equipment C CTHR Cut through or SPTE SPTF Split Facilities SPTE Split Equipment Figure 12 H2TU C 319 List 4E Block Diagram January 9 2002 H2TU C 319 List 4E LTPH UM 1049 02 Issue 2 Provisioning The separate control of K1 and K2 permits another test scenario Two external HDSL2 spans can be looped together at TB6 if the two H2TU C line units that connect to the two spans both enable their MTAF states and close K1 in each unit This will loop the two pairs together and allow metallic cable tests to be performed from any point in the loop where both pairs can be accessed Future enhancements to the H2TU C will also allow the following seven bit in band commands to control K1 and K2 MTAF Enable K2 1010011 MTAE Enable K1 1011110 DISABLE K1 or K2 1011011 Dual DSX 1 Port Option Figure 12 on page 30 is the block diagram of the H2TU C Dual DSX 1 Port option The Input Output 1 0 DS1 payload from the HDSL2 span is routed to either of the two Line Interface Units LIU Auxiliary AUX LIU and Multiplexer MUX LIU a
106. vent sees ese esse se ese se ee Gee Ge ee Ge Ge ee ee ee ee ee ee ee 48 Using the Report Menu sit Ee nth aie he ek ane ede Ai pees ee 50 H2TU C 319 List 4E January 9 2002 v Table of Contents LTPH UM 1049 02 Issue 2 Testing 52 SystemiA lars assesses veges GE eae eh pete hes east heise ence lg eel 52 Alarm Option for the Digital Loop Carrier Feed ee se ee ee GR Ge ee ee ee 53 Retiring System Alarms ss sr RR ene ED GE ERG Ee BEG ee RE ER Gee eo Ee ge ee eed 53 Remote LOS and AIS Response ees ee sees see Be ee EE BEd ee See ee Be See Se ee Be AA Be ee ee 54 OCT55 Test Pattern with AMI Line Code esse see se se ee GR Se ee Se ee ee ee Gee Rd Ge ee 54 Fee de lo ONE ER OE RE OO EE OR OER OR EI OR 55 Generic Loopback Commands iseseisana ieee RR GR IR ITEN ee Se ee ee ee 56 Special Loopback Commands esse sesse se ee ee be Ge GR GR GR Se ee Se ee ee ee ee se ee 56 SmartJack Loopback CommandS iese sesse sees se Se Ge Ge GR Ge ee Ge ee ee ee ee Ge ee 57 Manual Loopback SesS1On ee see se ee ee ee Ge RA GR AR Re Re SR ee ee ee ee ee RR ee ee 57 Activating Manual Metallic Test ACCESS ie sesse see se es se Ge Se ee ee Se ee ee Ge GR GR ee Se ee ee 58 in band Loopback SESSIONS ese RE Be Ge EE EED EA ES EER Se EES Gey EERS Reg ER See ge Bee Nege penne ont 59 General Troubleshooting Tips siirroissa ee ee Ge it ee Ge ee ee ee 59 GNEB Test Procedures EE iis EE DE es eis ed Sh cee ie Raley
107. work Management Control Bus on pin 7 of the card edge connector This allows the various ADC Management System protocols to manage the H2TU C through the HMU 319 HiGain Management Unit Whenever the H2TU C is under management the MNGD message displays periodically on the front panel display e Some H2TU C features are affected when it is under management Consult the management unit practice for further information Fuse Alarm Pin 10 on the card edge connector is a Fuse Alarm that is driven to 48 Vdc through a diode whenever its onboard fuse opens It emulates the function of the Fuse Alarm output from pin 10 on normal high density HD repeaters pin 10 is connected to pin 5 of the 1184 Alarm Card slot 1 in the HD shelf and causes the 1184 Fuse ALM LED to light when the pin 10 signal is activated Its normally floating output must never be driven above ground or below 80 Vdc It can sink a current of 10 mA The H2TU C does not support the BPV function pin E of normal HD repeaters H2TU C 319 List 4E January 9 2002 69 Appendix A Specifications LTPH UM 1049 02 Issue 2 70 System Alarm Output Pin Pin H on the card edge connector shown in Figure 33 is the H2TU C System Alarm output pin The following notes apply to pin H dis Pin H replaces the Local Loss of Signal LLOS on normal high density 3192 repeaters The normally floating output of pin H can connect to pin 1 of the 1184 or 3192 9F Alarm Card in position 29 of
108. ystem messages The front panel display illuminates when power is initially applied To conserve power the display only remains on for 5 minutes Using the MODE or LBK pushbuttons reactivates the display and restarts the 5 minute timer Refer to Table 2 on page 5 for a listing of the four character messages MODE and LBK system option pushbuttons Permits user options to be monitored and modified without the need of a maintenance terminal Used to initiate all HiGain loopbacks and test states as well as to display DSX 1 line parameters and line unit identity Status LED Off Green Flashing green Red Flashing red Yellow Flashing yellow The status LED can report the following conditions Line power is off Normal operation HDSL2 acquisition Fuse alarm System alarm An H2TU C Customer Remote Loopback CREM or a Network Local Loopback NLOC is in effect H2TU C is in an Armed state DSX 1 access jacks BRG LINE Provides non intrusive bridging jack access to IN and from OUT the HDSL2 span at the MUX DSX 1 interface Allows the two DS1 payloads to be monitored Provides splitting jack access to IN and from OUT the HDSL2 span at the MUX DSX 1 interface Breaks the IN and OUT paths to permit test signal insertion and retrieval Craft port RS 232 Provides bidirectional communication between the unit and an external terminal to allow configuration and performance monitoring through the maintenanc

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