Avaya Digital Drop and Insert (DDI) MUX Guia de Instalação descarregar pdf (Página 30)

30 Installing the DDI MUX

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DTE Loopback test

The DTE Loopback test forwards data transmitted by the DTE (TxD) and loops the data back to

the DTE (RxD). DTE Loopback test establishes a data path from the DTE through the internal

DDI MUX circuit and back to the DTE. Refer to Figure 7.

You must transmit a test pattern and monitor the received data at the DDI MUX data port. You can

use a Bit Error Rate Tester to generate and monitor data traffic.

Figure 7 DTE Loopback Test

To begin a DTE Loopback test:

1 Start a Unified Manager session.

2 Click the Resources key and then the Media Bay Modules key.

3 Click the key of the Bus number assigned to the Data Module.

4 Click the Data Module key and then click the Loopback status heading.

5 Click the Loopback drop list and then click Manual DTE or Automatic DTE.

If you choose Manual DTE, the DDI MUX enters loopback mode with the DTE. The DDI

MUX takes any data it receives from the DTE loops it back to the DTE.

If you choose Automatic DTE, the DDI MUX enters the DTE loopback state when requested

by the DTE. Use Automatic DTE only if this feature is supported by the DTE.

6 Exit the Unified Manager session.

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

Service Provider/

PSTN

T1 mux service

DTE cable

Router

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Avaya Digital Drop and Insert (DDI) MUX Guia de Instalação Página 30