Model 1088C/C Modem User Manual
Contents
1. MANUAL MODEL 2701 G 703 G 704 NTU with 10Base T Ethernet Interface Important This is a Class device and is C intended for use in a light industrial environ pE TON ment It is not intended nor approved for use M FlectronicsTo an industrial or residential environment 7 Part 07 27011 0 SALES OFFICE am 08609U2 001 301 975 1000 Rev G TECHNICAL SUPPORT Revised 6 26 07 301 975 1007 An ISO 9001 Certified Company CONTENTS 1 0 1 1 Eri mu 2 1 2 2 3 0 3 1 4 0 4 1 5 0 5 1 5 2 5 3 5 4 6 0 6 1 6 2 6 3 Warranty amp Compliance Information 4 Compliance EMC Compliance Safety Compliance e n 4 PSTN Regulatory Compliance Authorized European Representative 5 oath BS eS 5 Safety When Working With Electricity 6 General Information 7 Features east Pp SOR RAI E RR RR ES 7 Descriptio ior e npe te pm ege 7 PPP Operational Background 9 Applications oe rH EGER epe An tte 9 Configuratlon ne Rein tere 11 DIP Switch Configuration 11 Switch SW m eedem 12 Switch SW 1 through SW1 5 2 12 SW1 6 and SW1 7 Clock Mod2. 23 Operating Remote Digital Loopback RL 24 CSU LOOP aiu edet e IH een es 24 Using the V 52 BER Test Pattern Generator 25 2 B 1 B 2 B 3 B 4 B 5 B 6 B 7 B 8 B 9 B 10 11 Specifications 26 Network Data ated aaa ina Pr Freenet 26 Network Connector ceret tenet eter t ttes 26 Nominal Impedance n ette eret 26 Line treu t A e oa 26 Linie FRAMING ice e peteret eec pe totu 26 CRC 4 Multiframing 2 26 CIOCKING iN ta tee teo nen 26 TIME Slot Rates oes uc ec ania eter rd reed 26 Network Data RateS ret etr tri e ct e e n 26 Distance tenir get t wee arem ets 26 Power Supply siseunt Goo nn re ee eats 26 27 tue etra bs be tema aus 27 DIMENSIONS 131 Be ahi ree lta eee rada 27 Ethernet 10Base T Specifications 28 E IDtetf AGO sio e rmt ier eerie e rita 28 DIE Data Rates dc Lo DE n Pet ee b Eee ee aa 28 WAM Gofectlort Re 28 gioco m 28 MAC Address Table Size 28 MAC Address Aging seen 28 Frame Buten ctetur eve 28 Frame Eater ie err ote tei ete et dened ep c te
3. SW2 1 Line Encoding Off HDB3 On AMI Options HDB3 AMI HDB3 AMI In this line coding the transmitter substitutes a deliberate bipo lar violation when excessive zeros in the data stream are detected The receiver recognizes these special violations and decodes them as zeros This method enables the network to meet minimum pulse density requirements Unless AMI is required in your application HDB3 should be used whenever possible Alternate Mark Inversion defines a pulse as a mark a binary one as opposed to a zero In an E1 network connection signals are transmitted as a sequence of ones and zeros Ones are sent as pulses and zeros are sent as spaces i e no pulse Every other pulse is inverted from the previous pulse in polarity so that the signal can be effectively transmitted This means however that a long sequence of zeros in the data stream will 14 cause problems since the NTU receiving the signal relies on the signal to recover the 2 048 Mb s clock If you must use AMI you should ensure that the data terminal equipment connected to the unit provides a minimally accept able pulse density For this reason there are advantages to using HDB3 instead AMI coding does not inherently account for ones density To meet this requirement the user should ensure that the data inherently meets pulse density requirements Switch SW2 2 CRC 4 Multiframe In framed mode SW2 2 is used for CRC 4
4. If any errors are present the local modem s red ER LED will blink sporadically 2 If the above test indicates no errors are present move the V 52 tog gle switch DOWN activating the 511 E test with errors present If the test is working properly the local modem s red ER LED will blink once per second A successful 511 E test will confirm that the link is in place and that the Model 2701 I s built in 511 genera tor and detector are working properly Note The above V 52 BER tests can be used independently of the Remote Digital Loopback tests This requires two operators one to initiate and monitor the tests at the local Model 2701 and one to do the same at the remote Model 2701 In this case the test pattern sent by each Model 2701 I will not be looped back but will be transmitted down the line to the other Model 2701 While one operator initiates test the other moni tors for errors 25 APPENDIX SPECIFICATIONS A 1 NETWORK DATA RATE 2 048 Mbps A 2 NETWORK CONNECTOR RJ 48C Dual Coax BNC A 3 NOMINAL IMPEDANCE 75 120 ohm A 4 LINE CODING Selectable AMI or HDB3 A 5 LINE FRAMING G 703 Unframed or G 704 G 732 Framed A 6 CRC 4 MULTIFRAMING Selectable On or Off A 7 CLOCKING Internal or Network Receive Recover A 8 TIME SLOT RATE 64 kbps A 9 NETWORK DATA RATES 64 128 192 256 320 384 448 512 576 640 704 768 832 896 960 1024 1088 1152 1216 1280 1844 1
5. 30 NOTES 31 NOTES Copyright O 2007 Patton Electronics Company All Rights Reserved 32
6. a listed Limited Power Source Ensure that the power cable used meets all applicable standards for the country in which it is to be installed and that it is connected to a wall outlet which has earth ground The mains outlet that is uti lized to power the devise shall be within 10 feet 3 meters of the device shall be easily accessible and protected by a circuit breaker Hazardous network voltages are present in WAN ports regardless of whether power to the unit is ON or OFF To avoid electric shock use caution when near WAN ports When detaching the cables detach the end away from the device first Do not work on the system or connect or disconnect cables during periods of lightning activity In accordance with the requirements of council direc tive 2002 96 EC on Waste of Electrical and Electronic Equipment WEEE ensure that at end of life you sepa rate this product from other waste and scrap and deliver to the WEEE collection system in your country for recy cling This device is not intended to be connected to the public telephone network 2 0 GENERAL INFORMATION Thank you for your purchase of this Patton Electronics product This product has been thoroughly inspected and tested and is warranted for One Year parts and labor If any questions or problems arise during installation or use of this product please do not hesitate to contact Pat ton Electronics Technical Support at 301 975 1007 2 1 FEATURES Termina
7. 0 24 through 192 168 1 1 24 The address 192 168 1 1 24 is also the default gateway for the remote network The above settings remove any routing forwarding intelligence from the CPE The associated Cisco con figuration will set serial interface sO to accommodate half bridging for the above example Authentication is optional under PPP In a point to point leased line link incoming customer facilities are usually fixed in nature therefore authen tication is generally not required If the foreign device requires authenti cation via PAP or CHAP the PPP software will respond with default Peer ID consisting of the units Ethernet MAC address and a password which consists of the unit s Ethernet MAC address Some networking systems do not define network numbers in packets sent out over a network If a packet does not have a specific destination network number a router will assume that the packet is set up for the local segment and will not forward it to any other sub network However in cases where two devices need to communicate over the wide area bridging can be used to transport non routable protocols Figure 2 illustrates transparent bridging between two routers over a serial interface 50 Bridging will occur between the two Ethernet Inter faces on Router A e0 and e1 and the two Ethernet Interfaces on Router B 0 and et 2701 1 Serial Interface E1 FE1 Link ino ip routing interface Ether
8. 408 1472 1536 1600 1664 1728 1792 1856 1920 1984 2048 kbps A 10 DISTANCE Maximum 1 6 km 5 250 ft on 24 AWG Cable A 11 POWER SUPPLY 5 VDC External power supply 100 240 VAC 50 60Hz 0 4A 26 A 12 HUMIDITY Up to 90 non condensing A 13 TEMPERATURE 0 to 50 32 to 122 A 14 DIMENSIONS Plastic Case 9 0L x 5 3W x 2 0H cm 3 5L x 2 1W x 0 78H in Metal Case 3 2L x 13 8W x 14 6H cm 1 25L x 5 43W x 5 75H in 27 APPENDIX ETHERNET 10BASE T SPECIFICATIONS B 1 DTE INTERFACE 10Base T on RJ 45F B 2 DTE DATA RATES 10Mbps B 3 LAN CONNECTION RJ 45 10Base T 802 3 Ethernet B 4 PROTOCOL PPP RFC 1661 with Bridging Control RFC 1638 B 5 MAC ADDRESS TABLE SIZE 4096 entries B 6 MAC ADDRESS AGING MAC addresses deleted after 8 minutes of inactivity B 7 FRAME BUFFER 512 Frames B 8 FRAME LATENCY 1 frame B 9 DIAGNOSTICS 6V 54 Loopback CSU Loopback V 52 Patterns 511 B 10 INDICATORS E 1 Link 10Base T Link Ethernet Status Loss of Frame Sync Error Test Mode B 11 CONFIGURATION Two 8 Position DIP Switches 28 APPENDIX C FACTORY REPLACEMENT PARTS AND ACCESSORIES Patton Model Description 2701 B G 703 G 704 NTU with RS 530 interface 2701 C G 703 G 704 NTU with a V 35 interface 2701 D G 703 G 704 NTU with an X 21 interface 2701 1 G 703 G 704 NTU w 10Base T EN interface 08055DCUI Universal Input Power Supply 07M2701 User Manual 29 NOTES
9. 8 Connecting the 10Base T Ethernet Port to a PC ONOUBWH The 10Base T interface is configured as DTE Data Terminal Equip ment If the Model 2701 l is to to connect to another DTE device such as a 10Base T network interface card construct a 10Base T crossover cable and connect the wires as shown in the diagram below Figure 9 10BaseT Port 10Base T DTE RJ 45 Pin No RJ 45 Pin No 1 TD 1 TD 2 TD 2 TD 3 RD 3 RD 6 RD 6 RD Figure 9 10Base T Cross over Cable Connection 5 3 CONNECTING THE 10BASE T ETHERNET PORT TO A HUB The 10Base T interface is configured as DTE Data Terminal Equip ment just like a 10Base T network interface card in a PC Therefore it expects to connect to a 10Base T Hub using a straight through RJ 45 cable Use the diagram below Figure 10 to construct a cable to con nect the 10 BaseT interface to a 10Base T Hub 10BaseT Port 10Base T Hub RJ 45 Pin No RJ 45 Pin No 1 TD 1 RD 2 2 RD 3 RD 3 TD Figure 10 Connecting the 10Base T Ethernet Port to a Hub 19 5 4 POWER CONNECTION Universal AC Power 100 240 VAC The Model 2701 1 uses a 5VDC 2A universal input 100 240 VAC power supply center pin is 5V The universal input power supply has a male IEC 320 power entry connector This power supply connects to the Model 2701 1 by means of a barrel jack on the rear panel Many interna tional power cords are available for the universal powe
10. Loop is selected by the front panel switches If set to CSU the Model 2701 will initiate a CSU loop when Remote Loop is selected by the front panel switches S2 4 RDL Type Off Initiate a V 54 RDL loop when selected On Initiate a CSU loopback when selected Switch SW2 5 Front Panel Switches As the Front Panel Switches may be inadvertently toggled or in the event that the end user may not need to use the switches the installer may disable the front panel switches Set Switch S2 5 to determine whether the front panel toggle switches are active or inactive SW2 5 Option Off Front Panel Switches Enabled On Front Panel Switches Disabled Switch SW2 6 V 54 Response Disabled default V 54 Response is a special in band loopback facility that sends a pseudo random pattern over the data stream This is the only loopback that the unit can initiate This is useful for campus applications when you need to put a remote unit in loopback The unit responds to the V 54 loop back command and the whole process takes only a few seconds to com plete When V 54 Loopback is disabled the unit will not be able to send or respond to V 54 loopback commands The duration of the loopback is limited by the loopback timeout setting V 54 Response Enabled On V 54 Response Disabled 16 5 0 INSTALLATION external use and shall be rated for the proper applica tion with respect to voltage current anticip
11. MF When CRC 4 is enabled the unit monitors the incoming data stream for CRC 4 errors It transmits CRC 4 error counts to the transmitting unit When using timeslot zero TSO excessive errors may cause loss of frame or loss of sync If CRC 4 MF is used both units must be set for set for CRC 4 MF Otherwise the one using CRC 4 MF will detect loss of sync SW2 2 Option Off CRC Disabled On CRC 4 Enabled Note When the data rate is set to 2 048Mb s then the unit is forced into G 703 mode and it transmits user data on all 32 time lots There is no framing information therefore the CRC4 MF SW2 2 switch is ignored In all other rate settings the unit employs G 704 framing TSO is reserved for signaling Switch SW2 3 Data Inversion Set Switch S2 3 to determine whether or not the data stream from the local DTE is inverted within the Model 2701 before being passed to the G 703 G 704 network An inverted data stream may be required when you use the Model 2701 to communicate with a G 703 device that inverts the data on the remote end In typical installations data inversion is not necessary SW2 3 Option Zt IR a 222242224 Off Data not inverted On Data inverted Switch SW2 4 Remote Digital Loopback Type The user can set this switch to select the type of remote loop that will be initiated by the Model 2701 If set to V 54 the Model 2701 will initiate a 15 V 54 loop when Remote
12. an RDL test follow these steps 1 Activate RDL This may be done by setting the front panel switch to Remote 2 Perform a bit error rate test BERT using the internal V 52 genera tor as described on page 25 or using a separate BER Tester If the BER test indicates a fault and the Local Line Loopback test was successful for both NetLinkTMs you may have a problem with the twisted pair line connection CSU Loop Although CSU Loop is predominantly a T1 function the NetLink 2701 1 responds to central office initiated loop commands Customers can use this facility when the Central Office network switch supports CSU loops over an E1 interface When CSU Loop is selected and when in D4 framing mode the NetLink 2701 l will implement the loop up command when it recognizes the pat tern 10000 in the data stream for a minimum of 5 seconds The loop 24 down command is implemented by the pattern 100 in the data stream for a minimum of 5 seconds The NetLink 2701 l will respond to Universal Loopback De activate to clear all central office loops Using the V 52 BER Test Pattern Generator To use the V 52 BER tests in conjunction with the Remote Digital Loop back tests or with Local Line Loopback tests follow these instructions 1 Locate the 511 511E toggle switch the front panel of the 2701 1 and move it UP This activates the V 52 BER test mode and trans mits a 511 test pattern into the loop
13. ated tem WARNING perature flammability and mechanical serviceability The Interconnecting cables shall be acceptable for Once the Model 2701 is properly configured it is ready to connect to the G 703 G 704 interface to the Ethernet port and to the power source This section describes how to make these connections 5 1 CONNECTING TO THE G 703 NETWORK The Power G 703 G 704 and Ethernet Line connections are located on the rear panel of the Model 2701 Figure 5 shows the location of each of these ports 75 Ohm 120 Ohm Made in the USA TX RX 0 Power Ethernet LL Line 1 Figure 5 Model 2701 1 Rear Panel Connecting Dual Coaxial Cable 75 ohm to the G 703 Network The Model 2701 is equipped with dual female BNCs TX and RX for connection to a 75 ohm dual coax G 703 network interface If your G 703 G 704 network terminates via dual coaxial cable use the diagram below to make the proper connections See Figure 6 below Data TO TX RX Data Network FROM e e Network Figure 6 Rear Panel Showing Location of Connectors Note The outer conductor of the coax cables are isolated from system earth ground When using the 75 Ohm interface jumper straps JP3 JP6 JP7 and JP8 must be installed over the jumpers The jumpers are located next to the 17 BNC connectors Refer to the following section to open the case Open the case and install jumper straps for JP3 JP6 JP7 a
14. ers to a pair of NTUs and automatically forward data packets that are meant for the remote network Local packets are filtered and passed only to the local LAN 3 0 PPP OPERATIONAL BACKGROUND PPP is a protocol used for multi plexed transport over a point to point link PPP operates on all full duplex media and is a symmetric peer to peer protocol which can be broken into three main components 1 A standard method to encapsulate datagrams over serial links 2 A Link Control Protocol LCP to establish configure and test the data link con nection 3 A family of Network Control Protocols NCPs to establish and configure different network layer protocols In order to establish communications over a point to point link each end of the PPP link must first announce its capabilities and agree on the parameters of the link s operation This exchange is facilitated through LCP Configure Request packets Once the link has been established and optional facilities have been negotiated PPP will attempt to establish a network protocol PPP will use Network Control Protocol NCP to choose and configure one or more network layer protocols Once each of the network layer protocols have been configured datagrams from the established network layer protocol can be sent over the link The link will remain configured for these communications until explicit LCP or NCP packets close the link down or until some external event occurs The PPP Bridging Con
15. es 13 SWitCh SW2 eee US 14 Switch SW2 1 Line Coding HDB3 default 14 Switch SW2 2 CRC 4 Multiframe 15 Switch SW2 3 Data Inversion 15 Switch SW2 4 Remote Digital Loopback 15 Switch SW2 5 Front Panel Switches 16 Switch SW2 6 V 54 Response Disabled default 16 Installation sise 17 Connecting to the G 703 17 Connecting Dual Coaxial Cable 75 ohm to the G 703 Network 17 Opening the Case unie fine cec tides tint 18 Connecting the Twisted Pair 120 ohm to the G 703 Network 18 Connecting the 10Base T Ethernet Port to a PC DTE 19 Connecting the 10Base T Ethernet Port to a Hub 19 Power Connection 20 Universal Power 100 240 20 2 seal loans eee 20 Operation mE 21 POWER UD serre diene tane chat edie e terae gi iade 21 LED Stat s MOHRILOIS 3 uic ete eere c nS 21 Loop V 54 amp Telco 23 Operating Local Loopback LL
16. etailed description of each switch SW1 1 through SW1 5 setting fol lows the summary table below UJ UNMARY TAB Position Function Factory Default Selected Option DTE Rate Off DTE Rate Off DTE Rate Off DTE Rate Off DTE Rate Off SW1 7 Clock Mode SW1 8 Not Used N A Switch SW 1 through 5171 45 Switches SW1 5 to set the DTE data rate SW1 SW2 SW3 SW4 SW5 Speed On On On On On 64 kbps Off On On On On 128 kbps On Off On On On 192 kbps Off Off On On On 256 kbps On On Off On On 320 kbps Off On Off On On 384 kbps On Off Off On On 448 kbps Off Off Off On On 512 kbps On On On Off On 576 kbps Off On On Off On 640 kbps On Off On Off On 704 kbps Off Off On Off On 768 kbps On On Off Off On 832 kbps Off On Off Off On 896 kbps On Off Off Off On 960 kbps Off Off Off Off On 1024 kbps On On On On Off 1088 kbps Off On On On Off 1152 kbps On Off On On Off 1216 kbps Off Off On On Off 1280 kbps On On Off On Off 1344 kbps SW1 SW2 SW3 SW4 SW5 Speed Off On Off On Off 1408 kbps On Off Off On Off 1472 kbps Off Off Off On Off 1536 kbps On On On Off Off 1600 kbps Off On On Off Off 1664 kbps On Off On Off Off 1728 kbps Off Off On Off Off 1792 kbps On On Off Off Off 1856 kbps Off On Off Off Off 1920 kbps On Off Off Off Off 1984 kbps Off Off Off Off Off Clear Channel 2048 kbps Note When the da
17. locking Device 2Mbps G 703 Network Model 2701 1 Figure 13 Local Loopback for a Network Termination Application To perform a LL test follow these steps 1 Activate LL This may be done by selecting local loop on the front panel switch 2 Perform a V 52 BER bit error rate test as described on page 25 If the BER test equipment indicates no faults but the data terminal indicates a fault follow the manufacturer s checkout procedures for the data terminal Also check the interface cable between the ter minal and the Model 2701 23 Operating Remote Digital Loopback RL The Remote Digital Loopback RL test checks the performance of both the local and remote NetLink E1 as well as the communication link between them Any characters sent to the remote NetLink E1 in this test mode will be returned back to the originating device G 703 G 704 NTU G 703 G 704 NTU Model 2701 1 Model 2701 1 Ethernet Ethernet Device Clock BE Data Model 2701 1 Model 2701 1 Figure 14 Remote Loop in a Network Extension Application There are two Remote Loops that can be initiated from the NetLink 2701 unit 1 V 54 Loop and 2 CSU Loop The user can select the type of loop that can be initiated by Switch S2 4 When a loopback is initiated this is the type of loop that the unit uses to loop up the remote unit and which type of loop the unit will respond to To perform
18. nd JP8 Opening the Case Open the case by inserting a screwdriver into the slots and twist the screwdriver head slightly The top half of the case will separate from the lower half of the case Take caution not to damage any of the PC board mounted components Connecting the Twisted Pair 120 ohm to the G 703 Network The Model 2701 is equipped with a single RJ 48C jack for connections to a 120 ohm twisted pair G 703 G 704 network interface If your G 703 G 704 network terminates via RJ 48C use the connection diagram Figure 7 following the pinout and signals chart below to connect the 120 ohm G 703 G 704 network channel RJ 48C Cable 8 Wire G 703 G 704 2701 1 NETWORK SIGNAL SIGNAL RX R pe TX R RX T p TX T TX R RX R TX T RX T Shield 3 Shield Shield 6 Shield RJ 48C Jack Signal Name RX Receive Ring RX Receive Tip 2 3 p Shield 4 1 TX Transmit Ring gt 5 TX Transmit Tip 6 6 Shield 1 7 No connection TRES 8 8 No connection Figure 7 G 703 G 704 170 ohm Connection 18 5 2 CONNECTING THE 10 ETHERNET PORT TO A PC DTE 1 TD data output from 2701 1 ge TD data output from 2701 1 3 RD data input to 2701 1 7 4 no connection 5 no connection 6 RD data input to 2701 1 LT 7 no connection s no connection Figure
19. netO ip address 1 1 1 1 255 255 255 0 Ibridge group 1 LAN E Using Bridge Groups multi f interface Serialo 4 ple remote LANs can be D ip address 1 1 1 1 255 255 255 0 2 over ihe wide area lt 7 lencapsulation Ibridge group 1 gt interface Serial address 2 2 2 2 255 255 255 0 Ibridge group 1 P er protocol oe Link Figure 2 Transparent bridging between two routers over a serial interface 10 4 0 CONFIGURATION The Model 27017 features configuration capability via hardware DIP switches This section describes all possible DIP switch configurations of the Model 2701 1 4 1 DIP SWITCH CONFIGURATION The Model 2701 1 has two sets of internal DIP switches that allow config uration for a wide range of applications The sets of switches are accessed from the underside Figure 3 shows the location of the DIP switches on the bottom of the printed circuit board Front PETEA Location of Dip Switches Plastic Case Rear Location of Dip Switches Metal Case Figure 3 Underside of Model 2701 1 Showing Location of DIP Switches The Model 2701 1 DIP switches Switch Sets 1 2 can be configured as either ON or OFF Figure 4 shows the orientation of the DIP switches with respect to ON OFF positions ON 95345678 OFF Figure 4 Close up of configuration switches 11 Switch SW1 A d
20. nta 28 JIa EIOST GS 28 EL EE 28 COnTIQUIATION had 28 Factory Replacement Parts and Accessories 29 1 0 WARRANTY amp COMPLIANCE INFORMATION Patton Electronics warrants all Model 2701 1 components to be free from defects and will at our option repair or replace the product should it fail within one year from the first date of shipment This warranty is limited to defects in workmanship or materials and does not cover customer damage abuse or unauthorized modification If this product fails or does not perform as warranted your sole recourse shall be repair or replacement as described above Under no condition shall Patton Electronics be liable for any damages incurred by the use of this product These damages include but are not limited to the following lost profits lost savings and incidental or consequential damages arising from the use of or inability to use this product Patton Electronics specif ically disclaims all other warranties expressed or implied and the instal lation or use of this product shall be deemed an acceptance of these terms by the user 1 1 COMPLIANCE EMC Compliance EN55022 Class A EN55024 Safety Compliance EN 60950 1 AS NZS 60950 1 PSTN Regulatory Compliance TBR 12 amp 13 AS ACIF 5016 2001 1 2 CE NOTICE We certify that the apparatus identified in this document conforms to the requirements of Co
21. ow Figure 12 re PATTON ics Co NetLink 10BaseT G 703 G 704 NTU tini p Modes E1 10 Status LOS Local 0000 CO me 0 Front Panel Plastic Case ww emote TM LOS RD Status 1 Normal Normal ngne Local PHTTUN NetLink 10BaseT G 703 G 704 NTU Front Panel Metal Case Figure 12 2701 l Front Panels E1 Link Active Green Solid green On indicates that the end to end E1 Link is up signifying that the link is active The E1 Link LED is Off when the link is down 21 10BT Link Active Green Status LOS TM ER Solid green indicates that the 10BaseT Ethernet interface has detected a valid SQE heartbeat signifying a valid 10BaseT connection Blinks yellow from one to eleven times to indicate system sta tus Each pulse pattern is separated by a 2 second off period Greater pulse patterns have higher priority buffer sat uration has greater priority than an empty MAC table Valid System statuses are 1 pulse system status is okay 2 pulses no MAC entries in the MAC Address Table 3 pulses Clear to Send CTS or Carrier Detect DCD from base unit are not asserted 4 pulses IM1 I buffer is saturated 5 pulses WAN receive frame s too large 6 pulses WAN receive frame s not octet aligned 7 pulses WAN receive frame s aborted 8 pulses Detected WAN receive frame s with CRC 9 pulses Detected LAN receive f
22. r supply The Model 2701 1 powers up as soon as it is plugged into an AC outlet there is no power switch DC Power The 36 60 VDC DC to DC adapter is supplied with the DC version of the Model 2701 1 The black and red leads plug into a DC source nominal 48VDO and the barrel power connector plugs into the barrel power sup ply jack on the 2701 1 See Figure 11 To Power Supply Jack To 48VDC Vin Source Black lead V Red lead V Figure 11 Connecting DC Power to the 2701 DC Power Supply There are no user serviceable parts in the power supply section of the Model 2701 Con tact Patton Electronics Technical support at WARNING 301 975 1007 via our web site at http www patton com or by e mail at support pat ton com for more information 20 6 0 OPERATION When the Model 2701 1 has been properly configured and installed it should operate transparently This sections describes power up LED status monitors and the built in loopback test modes 6 1 POWER UP Before applying power to the Model 2701 l please read section 5 4 Power Connection on page 20 and ensure that the unit is properly con nected to the appropriate power source 6 2 LED STATUS MONITORS The Model 2701 l features six front panel LEDs that monitor connections on the G 703 G 704 and 10BaseT links signaling error and test modes Figure 10 below shows the front panel location of each LED Descrip tions of each LED foll
23. rame s too large 10 pulses Detected LAN receive frame s not octet aligned 11 pulses Detected LAN receive frame s with bad CRC The Loss of Sync LED lights when the unit loses synchroniza tion with the incoming signal This may happen when there is a framing mismatch or a loss of signal In unframed mode the LOS LED monitors the status of the transmit clock Active Yellow Solid Yellow indicates an Active Test Mode The unit may be placed in test mode by the local user or by the remote user The error LED indicates various error conditions including fram ing bit errors excessive zeros controlled slips severe errors or bit errors when sending V 52 test patterns When sending a test pattern the LED will remain lit if the unit does not receive the identical pattern When it receives the correct pattern the LED will turn off If error insertion is on the LED will blink once a second if everything is operating properly 22 6 3 LOOP V 54 amp TELCO DIAGNOSTICS The Model 2701 l offers three V 54 loop diagnostics Use these diagnos tics to test the NTU and any communication links These tests can be activated via the front panel switches Operating Local Loopback LL The Local Loopback LL test checks the operation of the local Model 2701 and is performed separately on each unit 2Mbps G 703 G 703 G 704 NTU Network Model 2701 1 Receive Recover All Switches Internal Ethernet set to OFF C
24. ta rate is set to 2 048Mb s the unit is forced into G 703 mode and it transmits user data on all 32 time lots There is no framing information therefore the CRC4 MF SW2 2 Switch is ignored In all other rate settings the unit employs G 704 framing TSO is reserved for signaling SW1 6 SW1 7 Clock Mode On On Network Received Recovered On Off Internal Off On Internal Off Off Network Received Recovered SW1 6 and SW1 7 Clock Modes Network Clock Transmitter timing is derived using the received line signal received recovered from the network Internal Clock Transmitter timing is derived from an internal clock Source 13 Switch SW2 A detailed description of each switch SW1 1 through SW1 5 setting fol lows the summary table below Position Function SW2 1 Line Coding swaz CRGA OF swa vsacsuseei oF owes FPS enabied OFF 2 lt voa Response oF C swr nausa oF SWITCH SET 2 SUMMARY TABLE Selected Option HDB3 Disabled 54 RDL loop Enabled OFF OFF OFF OFF OFF OFF Enabled OFF OFF A sw2 8 NotUsed na Switch SW2 1 Line Coding HDB3 default Use Switch SW2 1 to control the Network Line Coding options Set these options to be the same as the Line Coding given to you by your Service Provider If you are using two Model 2701 Is together as short range modems set both units to HDB3
25. tes G 703 and G 704 E1 fractional E1 service Available in low cost standalone or rack mountable versions nx 64 kbps data rates to 2 048 Mbps 10Base T Ethernet bridge PPP Point to Point Protocol RFC 1661 with Bridge Control Protocol RFC 1638 75 ohm dual coax and 120 ohm twisted pair G 703 connections Local and remote loopback diagnostics Internal and G 703 network timing CE and BABT approvals 90 260VAC amp 48VDC power options Conforms to ONP requirements CTR 12 and CTR 13 for connection to international Telecom networks 2 2 DESCRIPTION The Model 2701 receives channelized G 704 n x 64kbps or clear channel E1 G 703 2 048 Mbps data from the telco s digital data net work The Model 2701 1 terminates the G 703 telco interface and con verts the data for transmission to a user oriented 10Base T 802 3 Ethernet interface The Ethernet Model 2701 l supports an integrated 10Base T 802 3 Ethernet port with transparent bridging capability for IP IPX DECnet NetBIOS and other layer 3 protocols The 2701 l attaches to the LAN and intelligently bridges data traffic to the large central site router through the telco s leased line network The 2701 l supports PPP RFC 1661 and BCP RFC 1638 The Model 2701 is a 10Base T bridge that operates over G 703 G 704 lines It uses MAC learning and forwarding to provide seamless LAN to LAN connectivity As a result corporate enterprises can connect their serv
26. trol Protocol BCP defined in RFC 1638 config ures and enables disables the bridge protocol on both ends of the point to point link BCP uses the same packet exchange mechanism as the Link Control Protocol LCP BCP is a Network Control Protocol of PPP bridge packets may not be exchanged until PPP has reached the net work layer protocol phase 3 1 APPLICATIONS In situations where a routed network requires connectivity to a remote Ethernet network the interface on a router can be configured as a PPP IP Half Bridge The serial line to the remote bridge functions as a Virtual Ethernet interface effectively extending the routers serial port connec tion to the remote network The bridge device sends bridge packets BPDU s to the router s serial interface The router will receive the layer three address information and will forward these packets based on its IP address Figure 1 shows a typical Cisco router with a serial interface configured as a PPP Half Bridge The router serial interface uses a remote device that supports PPP bridging to function as a node on the remote Ethernet network The serial interface on the Cisco will have an IP address on the same Ethernet subnet as the bridge Patton 2701 F Internet ee PEC Device w Serial I F Ethernet LAN Customer Site Figure 1 Cisco router with serial interface configured as PPP Half Bridge For example the customer site is assigned the addresses 192 168 1
27. uncil Directive 1999 5 EC on the approximation of the laws of the member states relating to Radio and Telecommunication Ter minal Equipment and the mutual recognition of their conformity The safety advice in the documentation accompanying this product shall be obeyed The conformity to the above directive is indicated by the CE sign on the device 1 3 AUTHORIZED EUROPEAN REPRESENTATIVE DRM Green European Compliance Services Limited Oakdene House Oak Road Watchfield Swindon Wilts SN6 8TD UK 1 4 SERVICE All warranty and nonwarranty repairs must be returned freight prepaid and insured to Patton Electronics All returns must have a Return Mate rials Authorization number on the outside of the shipping container This number may be obtained from Patton Electronics Technical Services at Tel 1 301 975 1007 Email support patton com URL http www patton com Note Packages received without an RMA number will not be accepted Patton Electronics technical staff is also available to answer any ques tions that might arise concerning the installation or use of your Patton Model 2701 l Technical Service hours 8AM to 5PM EST Monday through Friday 1 5 SAFETY WHEN WORKING WITH ELECTRICITY A WARNING A WARNING e This device contains no user serviceable parts The equipment shall be returned to Patton Electronics for repairs or repaired by qualified service personnel The external power adapter shall be
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