American Telecom AM64/128A manual RS530 Interface Module, 21bis Interface Module

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AM 64/128A User Manual	Appendix B – Internal Link Settings

Interface Modules:

RS530 Interface Module:

J1 – Circuit 103 Termination.

J2 – Circuit 113 Termination.

J1 – V36 and RS530 Circuit 103 (Transmit data) Circuit Termination – This link connects a 120 ohm load resistor across the 103 circuit in position 1-3. This helps maintain signal rise times and minimises reflections at greater than 9.6 kbps over long lines. At lower rates and over short lines the termination resistor may be omitted, (link set position 1-2).

J2 – V36 and RS530 Circuit 113 (External Signal Element Timing) Circuit Termination – This link connects a 120 ohm resistor across the 113 circuit in position 1-3. This helps maintain signal rise times and minimises reflections at rates greater than 9.6 kbps over long lines. At lower rates and over short lines the termination resistor may be omitted, (link set position 1-2).

X.21bis Interface Module;

There are no links on the X.21BIS Interface module

G.703 Interface Module;

There are no links on the G.703 interface module.

WARNING

Only authorised personnel can be allowed to open the Line Terminating Unit case to change the link settings. Misuse or any modifications carried out to this unit other than in accordance with the instructions supplied, will invalidate the guarantee CE approval.

A-7

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Contents ATL Part No /203/002/610 Issue 4 September Base Band ModemInformation Contained This Document is Confidential to Contents Appendix B Introduction International ModelsBaseband Modems Constructional DetailsInterface Modules System Overview System Overview BBM to BBM Link InstallationTesting Self Test PassLTU Ready No Alarm LTU Not Ready Link ModeNetwork Mode BBM to Line Card LinkFront Panel Features Menu OperationLoop back Off Loop back OnOver all Status Status MenuLoop Active LOS/CD Fail Alarm StatusNo Alarm No Signal Receiving AIS No Alignment CD FailLine Rate User RateInterface Status Operating Mode Link Mode Network ModeLocal loop from menu Top level display shows Loc Loop Off Test MenuLocal loop Loc Loop OnLoopback is applied by selecting the display Loopback Off LoopbackLocal loop from DTE Loopback OnRem Loop Off Remote LoopRemote Loop from menu Rem Loop OnRemote loop from DTE Binary PatternsBin Keys Off Sending Bin Overview Error Count Bit Error Rate BER = User Data Rate x TimeData Test OperationErrors Errors nnnnnnErrors s000001 Data TestInjecting 0s Injection ModeTransparent Mode Injecting 1sComms Evp Rx Evp Tx Service TestSvc Test Time If the count is stopped the display is StopLamp Test Self TestCommunication Channel Loopback Comm Loop OffRate Menu Rate 4.8KMaster 64K BT Slave 4.8K Option Menu 2 X.21bisSignalling Rate Asynchronous Mode3 G.703 Character Length Char LenMaster Slave Configuration MenuLine Rate Modem 3 X.21 Loop ControlSynchronisation Type for software versions below Ext Bit Clk Synchronisation Type for software version V1.3 and aboveExt Byte Clk Internal ClkPower Level 5 64k ModeMenu Lock Glossary of Terms Band circuits General Specifications Way D-type X.21 V.11 Connector pin allocation Way D type X.21 bis V.24 / V.28* Connector pin allocationAppendix a Interface Pin Connections Mrac Connector Pin allocation Way D-type V.36 Connector pin allocationWay D-type RS-530 Connector pin allocation Line ConnectorAppendix B Internal Link Settings Page Interface Modules Interface ModuleRS530 Interface Module 21bis Interface ModuleService Test Facilities Frame StructureAppendix C In Service Test LVD Safety Statements TTE Network and Safety statementsAppendix E 21 bit timing cable 15 way to 15 way D type plugs24 / V.28 bit timing cable 25 way to 25 way D type plugs 21 byte timing cable 15 way to 15 way D type plugs35 bit timing cable 34 way to 34 way Mrac plugs 21 bis V.36 bit timing cable 37 way to 37 way D type plugs RS530 bit timing cable 25 way to 25 way D type plugsAppendix F Troubleshooting Master Mode C 64K Rate Slave Mode 64K RatePower 10dBm Rate 64K