American Telecom AM64/128A manual Test Menu, Local loop, Loc Loop On

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Menu Operation - Test Menu	AM64/128A User Manual

5.4Test Menu

1.Local loop

2.Loop back

3.Remote loop

4.Binary pattern

5.Data error test

6.In service error test

7.Lamp test

8.Self Test

9.Comms channel loop

5.4.1 Local loop

This is a loop applied within the local BBM. It loops data back to the DTE from a point as close to the interface connector as possible. This loop can be applied in two ways

(1)From the Menu.

(2)Direct from the DTE - see section 5.4.1.2.

5.4.1.1Local loop from menu

The top level display shows	T > Loc Loop Off


Pressing SELECT sets the loop		T > Loc Loop On

The top display in the status menu will display Loop Active and the TM LED should also light up. The data flow with the loop applied is shown in fig 5.4.1.1.

Figure 5.4.1.1

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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 ModelsConstructional Details Baseband ModemsInterface 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 OnStatus Menu Over all StatusLoop Active LOS/CD Fail Alarm StatusNo Alarm No Signal Receiving AIS No Alignment CD FailUser Rate Line 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 OnBinary Patterns Remote loop from DTEBin 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.21bisAsynchronous Mode Signalling Rate3 G.703 Character Length Char LenConfiguration Menu Master SlaveLine Rate 3 X.21 Loop Control ModemSynchronisation Type for software versions below Ext Bit Clk Synchronisation Type for software version V1.3 and aboveExt Byte Clk Internal Clk5 64k Mode Power LevelMenu Lock Glossary of Terms Band circuits General Specifications Way D type X.21 bis V.24 / V.28* Connector pin allocation Way D-type X.21 V.11 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 plugs21 byte timing cable 15 way to 15 way D type plugs 24 / V.28 bit timing cable 25 way to 25 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