Avaya BCM Management Betriebsanweisung PDF herunterladen (Seite 441)

Chapter 10 Testing, Troubleshooting, and Diagnostics 437

Business Communications Manager - Management User Guide

DS30 Loopback test

The DS30 Loopback test forwards data transmitted to the DTE (RxD) back to the MSC in the

Business Communications Manager. The DS30 Loopback establishes a data path from the MSC

through internal DS256 bus and the internal DDI Mux circuit and back to the MSC.

You must generate a test pattern and provide a means to monitor the data path at the network

connection. You can use a T1 Tester to generate and monitor data traffic. Connect the T1 Tester to

the RJ48C connector on the module.

In a system where a T1 connects to a CSU/DSUs, the far end CSU/DSU can generate and monitor

the network traffic while the local DDI Mux is in DS30 loopback tests.

To begin a DS30 Loopback test:

1 Click the keys beside Resources and Media Bay Modules.

2 Click the keys beside the Bus number assigned to the Data Module and Data Module.

3 Click on the Loopback status heading.

4 Click the Loopback drop list and then click Manual DS30.

If you choose Manual DS30, the DDI Mux enters loopback mode with the MSC. The module

takes any data it receives from the MSC loops it back to the MSC.

5 Exit from the Unified Manager session.

The TM LED lights to indicate the Loopback test has started.

6 View the TxD and RxD LEDs to make sure data is transmitted and received by the MSC.

Refer to “LED Indicator and Diagnostics” on page 436 for information about the LEDs.

(Status) On indicates there is data communication between the DDI Mux and the MSC card.

In Service Flashing indicates that the T1 trunks are out of service because a loopback test is

running or the DDI Mux is initializing.

Loopback On indicates a continuity loopback test is running on the T1 link.

Receive Alarm On indicates a problem with the received digital transmission on the T1 link. This

half-duplex link does not work.

Receive Error On indicates a small error as a result of degraded digital transmission on the T1 link.

Possible causes are an ohmic connection, water ingress, or too long a loop.

Transmit Alarm On indicates the DDI Mux cannot transmit on the T1 link. The module sends an

Alarm indication signal (AIS) to the terminating switch. This half-duplex link does not

work.

Transmit Error On indicates the DDI Mux is sending a remote alarm indication (RAI) carrier failure

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

indicates a far-end or cable problem.

Table 33 DDI Mux LED description

LED Description

1 2 ... 436 437 438 439 440 441 442 443 444 445 446 ... 487 488

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Avaya BCM Management Betriebsanweisung Seite 441