American Telecom AM64/128A manual Constructional Details, Baseband Modems, Interface Modules

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Constructional Details	AM64/128A User Manual

2.CONSTRUCTIONAL DETAILS

2.1Baseband Modems

The BBM is housed in a black plastic case. On the front panel there is a menu driven LCD display with six keys and five LED's. On the back panel there is a 3- pin IEC mains inlet socket, an input voltage selector switch (230V/120V), a 6-way - 4-loaded RJ11 connector type line cord socket, and one data interface connector. The data interface connector type will be from one of the six user specified interfaces available. Inside the plastic case is a metal case which contains the main PCB. The metal case is for EMC screening purposes. The front panel assembly containing the LCD, the keys, and the LED's are attached to the main PCB by two connectors feeding through the metal case.

The BBM is packed with a 2 meter mains lead, terminating on one end with a UK 3-pin mains plug as standard (or other plug if specified) and 3-pin IEC connector on the other. Also included is a double ended FCC connector 6-way 4-loaded RJ11 to BT 631A plug line cord (as standard, however other optional line cord plugs are available). These are both packed with the unit in separate tie-wrapped polythene bags.

The over all dimensions of the unit are 274L x 251W x 55H mm.

Figure 2.1.1 shows the BBMs front panel.

atl AM-64/128A

2.2Interface Modules

Six versions of the AM-64/128A are available, each with a different interface module fitted from X.21, X.21bis, V.35, V.36, RS530 and G.703. Each interface module is physically different from the others :

X.21	- 15 way D- type socket	Part Number -2/203/102/100.
X.21bis	- 25 way D- type socket	Part Number -2/203/202/100.
V.35	- 34 way MRAC socket	Part Number -2/203/302/100.
V.36	- 37 way D- type socket	Part Number -2/203/402/100.
RS.530	- 25 way D- type socket	Part Number -2/203/502/100.
G.703	- 9 way D- type socket Part Number -2/203/602/100.

The existing interface module can be changed out using a pluggable replacement unit. These can be ordered separately as per the part numbers detailed above.

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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