American Telecom AM64/128A manual Data Test, Errors nnnnnn, Errors s000001

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AM64/128A User Manual	Test Menu

The Data Test can be used to test the performance of a link (0 or 1 patterns on the two wire line are all AMI encoded and framed as described in section 3).

Note: Apply any loops required before entering Data Test Mode.

Enter the test menu and scroll to :	T> Data Test

There are four displays within this Data Test sub-mode:

then press SELECT.

1.Error display

2.Pattern display

3.Transparency display

4.Time display

Once the mode is entered, these displays can be changed by using the scroll keys in exactly the same fashion as in the main menus. The mode can be exited at any point by pressing one of the MENU keys. This returns the display to the line Data Test in the test menu.

1/ Error display

The BBM injects a binary 0 pattern immediately the mode is entered. The TM LED should light to verify this.

The display should then be

Errors nnnnnn

The number of bits received in error is nnnnnn. If the line is error free then the display will remain at 000000.

The SELECT key now performs two functions:

a). On the first press it will hold the current error count and time, (and stop counting further errors). A small “s” is displayed just prior to the error count to show this.

For example

Errors s000001

b). On the second press the error count and time will be reset, and the test restarted.

If the error count overflows the display will indicate a “>” character just before the error count.

For example

Errors > 000001

Note : once the error count has overflowed, no significance should be attributed to the number displayed. (It does not simply wrap around at 999999).

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Contents Base Band Modem ATL Part No /203/002/610 Issue 4 SeptemberInformation Contained This Document is Confidential to Contents Appendix B International Models IntroductionInterface Modules Constructional DetailsBaseband Modems System Overview System Overview Self Test Pass InstallationTesting BBM to BBM LinkLink Mode LTU Ready No Alarm LTU Not ReadyBBM to Line Card Link Network ModeMenu Operation Front Panel FeaturesLoop back On Loop back OffLoop Active Status MenuOver all Status CD Fail Alarm StatusNo Alarm No Signal Receiving AIS No Alignment LOS/CD FailInterface Status User RateLine Rate Link Mode Network Mode Operating ModeLoc Loop On Test MenuLocal loop Local loop from menu Top level display shows Loc Loop OffLoopback On LoopbackLocal loop from DTE Loopback is applied by selecting the display Loopback OffRem Loop On Remote LoopRemote Loop from menu Rem Loop OffBin Keys Off Sending Bin Binary PatternsRemote loop from DTE Operation Error Count Bit Error Rate BER = User Data Rate x TimeData Test OverviewData Test Errors nnnnnnErrors s000001 ErrorsInjecting 1s Injection ModeTransparent Mode Injecting 0sTime If the count is stopped the display is Stop Service TestSvc Test Comms Evp Rx Evp TxSelf Test Lamp TestComm Loop Off Communication Channel LoopbackRate 4.8K Rate MenuMaster 64K BT Slave 4.8K 2 X.21bis Option Menu3 G.703 Asynchronous ModeSignalling Rate Char Len Character LengthLine Rate Configuration MenuMaster Slave Synchronisation Type for software versions below 3 X.21 Loop ControlModem Internal Clk Synchronisation Type for software version V1.3 and aboveExt Byte Clk Ext Bit ClkMenu Lock 5 64k ModePower Level Glossary of Terms Band circuits General Specifications Appendix a Interface Pin Connections Way D type X.21 bis V.24 / V.28* Connector pin allocationWay D-type X.21 V.11 Connector pin allocation Way D-type V.36 Connector pin allocation Mrac Connector Pin allocationLine Connector Way D-type RS-530 Connector pin allocationAppendix B Internal Link Settings Page Interface Module Interface Modules21bis Interface Module RS530 Interface ModuleFrame Structure Service Test FacilitiesAppendix C In Service Test TTE Network and Safety statements LVD Safety Statements21 bit timing cable 15 way to 15 way D type plugs Appendix E35 bit timing cable 34 way to 34 way Mrac plugs 21 byte timing cable 15 way to 15 way D type plugs24 / V.28 bit timing cable 25 way to 25 way D type plugs RS530 bit timing cable 25 way to 25 way D type plugs 21 bis V.36 bit timing cable 37 way to 37 way D type plugsAppendix F Troubleshooting Rate 64K Slave Mode 64K RatePower 10dBm Master Mode C 64K Rate