ADTRAN 1xN User's Manual
Contents
1. protect unit Ifa fault is detected on an active line a series of facility initiated manual commands switch the standby module to an active mode in place of the faulted unit When the faulted unit malfunction is resolved another series of manually initiated commands or the reset switch returns it to active service and the standby unit is returned to standby status The LED bank shows module status during normal and standby conditions When circuit protection mode is disabled the Pro Cap unit can be used as a standard 8 slot T200 mounting Auto Protect Switching When the Pro Cap is used in association with the ADTRAN Total Access 3000 platform certain Total Access 3000 cards initiate an automatic protect function with the Pro Cap These cards send the same protect enable disable arming and switching codes as sent in the manual switching mode The Pro Cap does not require configuration changes to support the auto protect feature The same configuration supporting manual switching also supports automatic switching Additional information is in Section 9 of this practice Listed here are Total Access 3000 cards that initiate the auto protect codes mane 4 A Th e H2TUC 1181112L5 connections for power a arm and ground The lt H2TUR 1222026L7 shelf attaches to the mounting plate e H2TUR 1221026L7 2 Section 61190860L1 5 Issue 2 61190860L1 5B Documentation associated with the listed cards provides information on implement2. have span power capability to power the SCIM should that configuration be used Shelf Cards Channel cards are individually configured to meet network or customer requirements Certain cards only receive power from network span power These cards do not have pin contacts for shelf power CAUTION It must be determined if channel cards can receive both span power and shelf power Some cards may malfunction under that condition SCIM Controller Card Option switches on the SCIM controller circuit board are located behind an access panel Remove the housing from the shelf to gain access to the panel s thumb screw fastener refer to Step 1 of the Mounting Procedure See Figure 2 for SCIM Card connections terminals indication and switches Jg TV901 1V901 NYdS 1901 a WWiloud Z 9G PETL mM g g g g g g g g o a v3 XJ TIONLNOD Add OLLIINX Add WOH AD Figure 2 SCIM Card Elements 4 Section 61190860L1 5 Issue 2 61190860L1 5B Span Power Switch S1 This switch selects between span power or local power SPAN The SCIM receives power from the protect card in slot 8 LOCAL The SCIM receives power from local 48 VDC to terminal strip TB1 on the SCIM card NOTE Local 48 VDC can be jumpered from the shelf TB 1 terminals Protection Select Reset Switch S2 The first function of this pushbutton switch
3. 1100 0101 0100 0000 1100 0110 0100 0000 1100 0100 0100 1111 1100 0100 0100 0001 1100 0100 0100 0010 1100 0100 0100 0011 1100 0100 0100 0100 1100 0100 0100 0101 1100 0100 0100 O110 1100 0100 0100 0111 In Band Commands The in band commands are based on a 16 bit repeating binary pattern These patterns were selected to avoid random data replication and yellow alarm generation In band code qualifications involve receiving the codes for 5 contiguous seconds The in band codes can be transmitted using SF ESF framing or unframed See Table 2 for in band commands Out of Band Commands The out of band commands are based on the ANSI T1 403 1995 standard on T1 protection switching ANSI T1 403 1995 Table 4 specifies the command and response messages for T1 protection switching Out of band code qualifications involve receiving the codes for greater than 4 consecutive messages See Table 3 for out of band commands Table 3 Out Of Band Commands Hex Switch Arming 18FF Slot Enable T8FEF Slot Disable 7TAFF Switch Release 26FF 0010 0110 1111 1111 Switch Activation Code Binary Pattern 0001 1000 1111 1111 0111 1000 1111 1111 0111 1010 1111 1111 0010 0100 1111 1111 0100 0010 1111 1111 0100 0110 1111 1111 0100 1000 1111 1111 0100 1010 1111 1111 0100 1100 1111 1111 0100 1110 1111 1111 0100 0100 1111 1111 61190860L1 5B Section 61190860L1 5 Issue 2 7 PROTECTION SWITCH In Band Slot Ena
4. enables or disables standby protection for individual slots 1 through 7 Protection for selected slots can be disabled if cards of a different technology occupy those slots or to meet SLA agreements Protection is selected using the following procedure 1 Depress S2 for 5 seconds Slot 1 LED will start to flash green all other LEDs will be OFF Release S2 2 To enable protection for slot 1 press and release S2 Slot 1 LED will turn solid green and the LED for slot 2 will begin to flash 3 To pass over a slot that is not to be protect enabled wait several seconds while that slot s LED is flashing The LED turns OFF and the next LED begins to flash green 4 Continue this process until the LEDs for all slots designated for protection are ON The protect configuration once established is maintained in memory The second function of this switch is to reset the protect configuration in the event the protect card was enabled to temporarily replace a malfunctioning shelf card After the system is returned to normal depressing S2 for a minimum 5 seconds resets the protect configuration stored in memory Immediately release the pushbutton when the LEDs return to the protect configuration Protect Switch S3 This switch controls the protect feature ON All standby and protect functions are active OFF The standby module in slot 8 is cut through and detection circuitry disabled If the standby card was supplying sp
5. line code for 400 ms followed by AIS Switch XXX Line Number see Table 3 4 Remove Pattern Slot is now Enabled or Disabled for protection switching Table 7 Out Of Band Protection Switch Protocol ee Bit Oriented Datalink Pattern Controller Card Step Command Patterns E Send Arming Code 0001 1000 1111 1111 Loopback Arming Code for 400 ms followed by AIS Send Protection Line 0100 XXXO 1111 1111 Loopback line code Switch Code XXX Line Number see Table 3 Slot Enabled Perform switchover after 4 consective messages received Slot Disabled Loopback line code followed by AIS No switchover 61190860L1 5B Section 61190860L1 5 Issue 2 9 See Figure 5 and Figure 6 for switchover codes and traffic results NOTE Communication using in band codes will override 8 SWITCHBACK the customer s data during the switchback Switchback operation is defined as the operation The customer s data will be overridden re establishment of the T1 transmission path between for 10 seconds These remote provisioning the network and the customer using the regularly commands are transmitted to the controller card assigned line Communication between the COE and from aremote test facility ora T1 test setata DSX RE will be based upon in band or out of band ESF panel datalink commands Switchback Receive Path Local Remote Depressing S2 on the SCIM card for a minimum 5 Switchback operation is accomplished by sending a seconds resets t
6. or repair this product within ten 10 years from the date of shipment if it does not meet its published specifications or fails while in service Refer to ADTRAN U S and Canada Carrier Networks Equipment Warranty document 60000087 10 Contact Customer And Product Service CAPS prior to returning equipment to ADTRAN For service CAPS requests or further information contact one of the following numbers ADTRAN Sales Pricing Availability 800 827 0807 ADTRAN Technical Support Pre sales Applications Post sales Technical Assistance 800 726 8663 Standard hours Monday Friday 7 a m 7 p m CST Emergency hours 7 days week 24 hours day ADTRAN Repair CAPS Return for Repair Upgrade 256 963 8722 Repair and Return Address ADTRAN Inc CAPS Department 901 Explorer Boulevard Huntsville Alabama 35806 2807 12 Section 61190860L1 5 Issue 2 61190860L1 5B
7. Hex for 5 Sec then No Sync for 5 Sec Repeat until X Line Number pattern is removed Send Protection Line Switch C44X where X line number Slot is now Enabled or Disabled for protection Remove Pattern ess switching 8 Section 61190860L1 5 Issue 2 61190860L1 5B In band Protection Switch Protocol Out of Band Protection Switch Protocol See Table 5 for in band protection switch protocol See Table 7 for out of band protection switch protocol Out of Band Enable Disable Protocol See Table 6 for out of band slot enable disable protocol Table 5 In Band Protection Switch Protocol Fea ee In Band Pattern Controller Card ES Send Arming Code C440 Hex Loopback the Arming Code Send Protection Line C44X Hex Loopback the C44X code where X line number Switch Code X Line Number Slot Enabled Perform switchover 5 seconds later Loss of sync Slot Disabled Continuous Loopback of the C44X code where X line number No switchover and no loss of sync Table 6 Out Of Band Enable Disable Protocol Panes ah Bit Oriented Datalink Pattern Controller Card E Send Arming Code 0001 1000 1111 1111 Loopback Arming Code for 400 ms followed by AIS Arming Loopback Arming Code for 400 ms followed by AIS for 400 ms followed by AIS Send Slot Enable or Enable 0111 1000 1111 1111 Loopback the Enable Disable code for 400 ms Disable Code Disable 0111 1010 1111 1111 followed by AIS Send Protection Line 0100 XXXO 1111 1111 Loopback
8. Of Band Commands ccccccesseeeeeees 7 ADTRAN Total Access 3000 Carrier Class Table 4 In Band Enable Disable Protocol 8 Broadband Multiservice Access Table 5 In Band Protection Switch Protocol 9 Platform or any standard Office Repeater Bay ORB Table 6 Out Of Band Enable Disable Protocol 9 with Tl or HDSL to provide a Protection Switching Table 7 Out Of Band Protection Switch Protocol 9 Table 8 In Band Protection Release Protocol 11 NED OTE CHE NT Table 9 Out Of Band Protection Release Protocol 11 The Pro Cap housing accepts eight T200 type circuit Table 10 Specifications siccssstucinsenaaciansedageasedecensnededencnel 12 cards or four dual slot T400 DS 1 HDSL or HDSL2 circuit cards The unit is a wall mounted assembly 1 GENERAL that provides convenient access to CPE connections This practice provides installation and operational The assembly incorporates a circuit board backplane procedures for the ADTRAN Remote 1xN Pro Cap that provides a choice of amphenol connector Ot protection switch multi mount housing P N wire wrap pins for facility wiring hook up 1190860L1 See Figure 1 Pro Cap initiates remote switching ofa DS1 or HDSL circuit to a standby line following detection of a fault This eliminates the immediate need for a vehicle dispatch to investigate The Pro Cap accepts 48 VDC local power or a modular power supply that inse
9. PERATION Protect operation is defined as the transport of data from the network to the customer using a standby line connected to Slot 8 Communication between the COE and RE will be based upon in band or out of band ESF datalink commands Upon detection of a fault on an active line the controller card will not automatically switch the customer s data onto the standby line A remote provisioning command must be used to switch the customer s data onto the standby line Once the customer s data is on the standby line CUSTOMER PREMISES lt Live Traffic gt T1 HDSL HDSL2 NORMAL OPERATION Figure 3 Normal Operation 6 Section 61190860L1 5 Issue 2 61190860L1 5B this condition will be locked until a remote provisioning command orders the controller card to switch the customer data back onto the main line or a signal failure of greater than 30 seconds occurs on the protect Slot 8 Protect Receive Path The receive path is non protected and transformer coupled between the network and the customer The receive path is monitored for in band or ESF bit patterned datalink messages The receive path will be a passive transmission path Protect Transmit Path The transmit path is non protected and transformer coupled between the network and the customer The transmit path will be a passive transmission path Table 2 In Band Commands Switch Activation Code Binary Pattern 1100 0100 0100 0000
10. Section 61190860L1 5B Issue 2 January 2002 i a a CLEI Code NCM5NTDD_ 1xN Remote Protection Switch Pro Cap Installation and Maintenance CONTENTS le GENERAL seserian oide eir iei enrian 1 2 INSTALLATION essnoorrsidrieid eie 3 3 CONFIGURATION 0 cc cccesssssssssseeceeeeeeeeeeeeees 4 OPERATIONAL DESCRIPTION eee 5 5 NORMAL OPERATION cccccceesssssssseseesseerseees 6 6 PROTECT OPERATION cc cccceeccseeeeeeeeeeees 6 7 PROTECTION SWITCH c cc ccceeeeeeesssseeeeeeees 8 8 Ay esansd ce erstssatesliesbotlapsveedessautetecnstetic 10 9 AUTO PROTECT OPERATION eee 11 10 SPECIFICATIONS crsesscessaccscscheassesisessinecetleaseesetietens 12 11 MAINTENANCE uu 0 ccccccccccccccccceceeeeeeeeeeeeesseeseees 2 12 WARRANTY AND CUSTOMER SERVICE 12 j FIGURES j Fines l TIN Pro Capas l Figure 2 SCIM Card Elements wiscccsccsacsvansssontecusennctnnns 4 Figure 3 Normal Operation oisisscdiiccasiccnaitearieserencussracrcaes 6 Figure 4 Arming Operation sssssoossseeeeerrssssssssssssee 8 Fig re5 Protect Operation siicenccduiceaviniagertacesdaaraesiaxsanes 10 PIO SWitChOV T escrire sena a 10 Figure 7 Total Access 3000 Auto protect Switching 11 TABLES Figure 1 1xN Pro Cap Table 1 LED indicat On sccis inasa 3 Table 2 In Band Commmands ccccccetceeseeteeeeees 7 Pro Cap can be used in conjunction with the Table 3 Out
11. an power to the SCIM all the LEDs will be OFF If the SCIM was receiving local 48 VDC power all the LEDs will flash red NOTE The protect card in slot 8 should have span power capability either permanent or as an enabled option Local Power Terminal strip TB1 on the SCIM card accepts local 48 VDC power Installation requires that wiring 14 to 26 AWG be routed from the back of the SCIM housing This arrangement is an alternative to span power the SCIM receives from the protect card Slide switch S1 selects between span power or the 48 VDC supply SCIM frame ground is attained through a separate ground terminal 4 OPERATIONAL DESCRIPTION The SCIM card is a component of the Pro Cap assembly that provides T1 drops to the customer through an RJ 48C or Amphenol connector The T1 1x7 Controller Card is an enhanced SCIM that also performs manual 1x7 protection switching on T1 HDSL services The controller card is designed to function as a manual protection switch and does not have the capability to address an automatic protection switch function T1 protection switching is accomplished through two network elements e Central Office Element COE e Remote Element RE The COE functions as the master of the protection switching operation by initiating all commands The RE will only respond to the COE commands The controller card and a Network Interface Unit NIU represent the RE A Digital Test Access Unit DTAU a Digi
12. ble Disable Protocol Remote provisioning for a protection switch can be See Table 4 for in band slot enable disable protocol accomplished by sending a specific sequence of in band or out of band messages These remote provisioning commands are transmitted to the controller card from a remote test facility or a T1 test set ata DSX panel Arming Arming the controller card prevents an inadvertent protection switch operation The controller card can be armed with the presence of the appropriate in band or out of band pattern on the network receive interface Disarming the controller card can be accomplished with the presence of an in band 11100 or out of band ESF datalink NIU loop down pattern on the network receive interface a 1 hour time out a protection switch or a manual reset See Figure 4 for arming activation CENTRAL OFFICE CUSTOMER PREMISES Repeater B Office Repeater or lt Live Traffic gt HTU C T1 HDSL HDSL2 Office Repeater or lt Arming Codes gt HTU C WECO D4 WESCOM 3192 ARMING OPERATION Figure 4 Arming Operation Table 4 In Band Enable Disable Protocol COE In Band Commodi Paes In Band Pattern Controller Card Send Arming Code C440 Hex Loopback the Arming Code Send Slot Enable or Cs40 Hex Enable Loopback the Enable Disable code for 5 Sec then Disable Code C640 Hex Disable No Sync for 5 Sec Repeat until pattern is removed Loopback the C44X code where X line number C44X
13. he protect configuration in memory specific sequence of SF in band patterns or ESF datalink messages over the standby line CENTRAL OFFICE CUSTOMER PREMISES Office Repeater Office Repeater or lt Live Traffic gt HTU C T1 HDSL HDSL2 a Office Repeater or HTU C Switch Codes gt WECO D4 WESCOM 3192 CUSTOMER PREMISES Office Repeater or SS Office Repeater lt Live Traffic gt or lt Live Traffic gt HTU C WECO D4 WESCOM 3192 T1 HDSL HDSL2 SWITCHOVER Figure 6 Switchover 10 Section 61190860L1 5 Issue 2 61190860L1 5B In band Release Protocol 9 AUTO PROTECT OPERATION See Table 8 for return to normal operation When the Pro Cap is configured in a Total Access 3000 network optioned for the auto protect feature the Out of Band Release Protocol TA 3000 will re map a failed loop s data to the TA See Table 9 for return to normal operation 3000 protect unit which in turn sends the protect initiate codes to the Pro Cap The Pro Cap will put its protect unit online to complete the standby transmission loop to the customer Loss of data Signal Transmit The controller card will transmit a 0 dB signal Line Build Out LBO transmission on a particular loop for any reason The controller card will not provide LBO functions initiates the protect function See Figure 7 Normal The controller card will rely upon the NIU to provide transmission 1s automatically restored when the failure LBO
14. holes 6 Align the mounting plate to the pilot holes and attach to the wall with appropriate fasteners 7 Reassemble the unit by reversing steps 1 through 3 Cable Connections Frame Ground Both the shelf and SCIM have separate ground connections Each must be connected to a known approved ground location Verify metal to metal contact on all connections and ensure ground circuit continuity The shelf has various openings for wire route options along with tie wrap anchor points and extrusions for securing cables and connectors Specific wiring arrangements are customer developed CAUTION Transmit and receive loops to both facility and CPE have two connection schemes Only one connection method is to be used not both Facility Side Amphenol Connection The to facility and from facility amphenols can be either left side or right side oriented Table 1 LED Indication Slot LED Flash Green Solid Green Flash Red Solid Red Flash Red Green 1 7 Protect Request to Protect Deselected Protect Enable Enabled PROT No Network Signal Protect Card Disabled In Protect Protect Protect In Protect Card Protect Protect Card Only one module at a time in slots 1 through 7 can be in Protect Mode Protect switch S3 OFF 61190860L1 5B Section 61190860L1 5 Issue 2 3 Wire Wrap The to facility and from facility wire wraps are an alternate method in lieu of the amphenol connections Custo
15. ing the auto protect function LED Indication Table 1 describes LED indication e All LEDs OFF indicates no power to the SCIM e All LEDs flashing red indicates the protect card is disabled and SCIM power is local 48 VDC 2 INSTALLATION CAUTION SUBJECT TO ELECTROSTATIC DAMAGE OR DECREASE IN RELIABILITY HANDLING PRECAUTIONS REQUIRED After unpacking the unit inspect it for damage If damage is noted file a claim with the carrier then notify ADTRAN Refer to Warranty and Customer Service Mounting Procedure The 1xN Pro Cap installs at the remote location using the following procedure NOTE All component fasteners are spring loaded captured thumb screws 1 Remove the housing from the shelf by unscrewing the two thumb screws on the side of the housing The housing pulls out and away from the shelf 2 Remove the shelf from the mounting plate by unscrewing the thumb screw at the top center of the shelf bay It is not necessary to remove the SCIM assembly unless its position is to be reversed to the other side of the shelf 3 The shelf assembly lifts away from the mounting plate by disengaging the chassis tabs from the mounting plate support hooks 4 Using the mounting plate as a template position the mounting plate at the desired location and mark four pilot holes Ensure the unit is level and that cable plugs will reach their designated sockets 5 Using an appropriate bit drill the four pilot
16. is corrected Table 8 In Band Protection Release Protocol COE In Band een In Band Pattern Controller Card Send switch release code C44F Hex Loopback Release Code Perform switchback 5 seconds later Remove pattern oo Slot is returned to normal operation Table 9 Out Of Band Protection Release Protocol Step COE In Band Bit oriented Datalink Controller Card Command Patterns Pattern Send switch release code 0010 0110 1111 1111 Perform switchback after 4 consecutive messages received Total Access 3000 Normal Operation gt Auto Protect Operation Loop A Failure Figure 7 Total Access 3000 Auto protect Switching 61190860L1 5B Section 61190860L1 5 Issue 2 11 10 SPECIFICATIONS See Table 10 for Specifications Table 10 Specifications Specification Physical Interface Signal 100 ohms 20 at 772 kHz Coding Framing Line Rate Transmit Signal Insertion Loss Line Impedance Maximum Detect Error lt 10 Rate Power Span Power at 57 to 63 mA Local Power at 24 VDC to 56 VDC DC Voltage Drop Span 24 VDC at 60 mA Powered 40 C to 65 C Up to 95 noncondensing Operating Temperature Humidity UL 1950 3 Edition FCC Part 15 Subpart B Class A Requirements UL Compliance FCC Compliance 11 MAINTENANCE The Pro Cap does not require maintenance for normal operation 12 WARRANTY AND CUSTOMER SERVICE ADTRAN will replace
17. mer Side Amphenol Connection The to CPE and from CPE amphenols should be left side oriented to prevent SCIM panel removal interference after amphenol installation RJ 48C These modular jacks are an alternate method in lieu of the amphenol connections 48 VDC Terminal Local DC power connects to terminal strip TB1 at the bottom of the shelf backplane This power source is distributed across the backplane to slots 1 through 8 and can jumper to the SCIM TB1 to power the controller card NOTE Both the shelf backplane and the SCIM card each havea TB1 terminal strip This practice identifies the specific TB1 when referenced in the text 3 CONFIGURATION Shelf There are no configuration selections on the shelf backplane If 48 VDC is connected to TB1 on the shelf card there is no need for the power card unless for a spare power source Power Card The PWR card has an AC power cord that inserts into a standard 110 volt AC grounded wall outlet When AC power is in use local power should not be connected to TB1 on the shelf card The PWR card also applies power to the same TB1 shelf terminals which in turn can be jumpered to TB1 on the SCIM card Protect Card The protect card can receive power from either the network span or from the backplane 48 VDC To initiate the protect feature the card in slot 8 must support the technology of the channel cards that are enabled for protection The protect card should also
18. p pins CPE connections are made to RJ 48C modular jacks or 25 pair Amphenol XMT RCV connectors Auto Protect Switching with Total Access 3000 applications Swing open tinted Plexiglas front cover Available with key locking metal cover List 4 Option Includes standard 10 year warranty Physical Description The 1xN Pro Cap consists of four elements 1 Mounting Plate The mounting plate attaches to a customer premises backboard 2 Shelf The shelf has slots for seven channel modules one standby protect module and one power module plus two external edge connectors for the SCIM The power terminal strip has 3 Switch Customer Interface Module This module inserts into one of the SCIM edge connectors located on either side of the shelf It has both amphenol and RJ 48C interface connections to the customer loop Behind an access panel is a power connection terminal strip a Slide switch for either span or local power protect ON OFF switch and a pushbutton for selecting individual module protection or resetting the protect configuration Selection and status is indicated with associated LEDs on the SCIM front panel 4 Housing Cover The Plexiglas swing door housing cover encloses the shelf allowing viewing and access to the shelf modules Functional Description During normal customer and network transmission data is transported through the active modules in slots 1 through 7 The module in slot 8 is the standby
19. rts into the POWER slot at the far right of the shelf The power supply module includes an AC power cord that plugs into a trouble or provide standby service The shelf also standard 110 VAC grounded outlet accommodates DDS and ISDN technologies but without protection The Switch Customer Interface Module SCIM can mount to either the left or right side of the Pro Cap housing to facilitate access to all CPE connections 61190860L1 5B Trademarks Any brand names and product names included in this document are 1 trademarks registered trademarks or trade names of their respective holders The SCIM can be locally powered by 48 VDC or span powered from the standby unit in slot 8 if equipped for span power Slide switch S1 selects between local or span power CPE receive and transmit connections are either amphenol or RJ 48C jacks Revision History Issue 2 adds Auto Protect information when the Pro Cap is configured in a Total Access 3000 network Features The 1xN Pro Cap includes these features Protection module Compact and lightweight assembly that accommodates eight T200 mechanics or four T400 mechanics modules Reversible SCIM for right side or left side assembly Prewired backplane to minimize wiring errors and installation time Protect module can function as standard channel module Dedicated slot for modular power supply LEC facility connections are made by 25 pair Amphenol XMT RCV connectors or wire wra
20. st for that slot is received on the protect channel the slot will switch If the slot is protect disabled it cannot be switched 5 NORMAL OPERATION Data is transported from the network to the customer through an assigned slot slot 1 through slot 7 The standby line is transported through slot 8 see Figure 3 CENTRAL OFFICE Repeater Office Repeater or HTU C DCS TY Office Repeater or HTU C WECO D4 WESCOM 3192 Normal Receive Path The receive path is non protected and transformer coupled between the network and the customer The receive path is monitored for in band or ESF bit patterned datalink messages The receive path toward the network will be terminated with a 100 ohm resistor This 100 ohm termination increases the reliability of T1 signal recovery and minimizes crosstalk The receive path toward the customer will be an open termination Normal Transmit Path The transmit path is non protected and transformer coupled between the network and the customer Passive Mode The controller card can be configured to establish a passive transmission path by detecting a T1 signal from the customer The transition from normal to passive mode will require the loopback to the network removed and the receive path to the customer to be reconnected Passive Mode to Normal Operation The controller card will return to normal operation by detection of a loss of signal from the customer 6 PROTECT O
21. tal Cross connect or a T1 Test Set can represent the COE The controller card uses the card in slot 8 of the Pro Cap mounting as the standby service The NIU in slot 8 will provide the appropriate physical layer interface to the network 1 e HDSL2 HDSL or T1 AMI and 4 Wire T1 AMI physical layer interface to 61190860L1 5B Section 61190860L1 5 Issue 2 the controller card The controller card will continuously monitor the network receive T1 transmission service in slot 8 i e standby line for commands Upon the receipt of these commands the controller card will initiate the T1 service switchover from the requested line 1 through 7 to the standby line The controller card when optioned for protect will conduct the following 1 Monitor the incoming network signal to determine if the protect line is operational If the line 1s operational the FAIL LED will be OFF If no signal is present the slot 8 PROT LED will be OFF and the FAIL LED will be ON 2 Provide a loopback to the network as long as a transmit signal is not present from the CPE Ifa signal is placed on the slot 8 CPE transmit to the network the loopback will be released and normal transmission to and from the network can occur Upon removal of the transmit signal loopback will be activated The SCIM controller card can be locally or remotely provisioned to either enable or disable slot switching capability Ifa slot is protect enabled when a switch reque
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