Avaya BCM Management Guia do Utilizador descarregar pdf (Página 430)

426 Chapter 10 Testing, Troubleshooting, and Diagnostics

P0609330 2.0

• Transmit Error: yellow LED on indicates a remote alarm indication (RAI) carrier failure

alarm (CFA) is being sent to the terminating switch. If the Transmit Alarm is not on, this

indicates a far-end or cable problem.

• In service: flashing green LED indicates that the T1 or PRI trunks are out of service because

of a running loopback test, or because the DTM is being initialized.

• Loopback test: red LED on indicates a continuity loopback test is running.

• All LEDs flashing continuously: the DTM is being initialized.

2 In the Unified Manager, select

Resources, Telephony, Maintenance, and Tests to run

any loopback tests as appropriate.

3 Check the pinout of the cable that connects the DTM to the termination point from the T1 or

PRI service provider or the external channel service unit, and check that the cable is properly

connected.

4 Check with your T1 or PRI service provider to see if through-fed repeaters are used on the T1

or PRI span. The DTM does not provide the DC connection required for through-fed repeaters.

If through-fed repeaters are used on the T1 span, disable the internal CSU and connect the

DTM to an external CSU.

5 If the problem persists, replace the DTM.

For information on how to replace any system components, refer to the Business Communications

Manager Installation and Maintenance Guide

Monitoring the T1 or PRI signal

If you are finding minimal faults with the T1 or PRI signal, you can monitor the signal to try and

isolate the problem. The monitor jack on the DTM faceplate provides non-intrusive, bridged

in-service monitoring of the T1 or PRI signal. Connect a protocol analyzer or other test equipment

into the monitor jack to monitor the signal received from the network, and the signal transmitted

by Business Communications Manager.

Problems with trunk or station modules

1 Choose Resources, Media Bay Modules and the bus that the module is on to ensure that

the module is not disabled. For more information, refer to the procedure, “Media Bay Module

status” on page 427.

2 Disable the module using the procedure, “Disabling/enabling a single module” on page 428.

Caution: Notify service provider of T1 or PRI signaling disruption.

Notify your T1 or PRI service provider before disconnecting your T1 or PRI lines,

removing power to your system, or performing any other action that disrupts your T1 or

PRI signaling. Failure to notify your T1 or PRI service provider may result in a loss of T1

or PRI service.

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