Multi-Tech Systems DT102, DT101 Internal ISDN Terminal Adapter, Troubleshooting, Possible Causes

Chapter 7 - Troubleshooting

Internal ISDN Terminal Adapter

Problem

Composite link down with CTS, XMT and RD LEDs on

Composite link down with CD, CTS, XMT, RCV and RD LEDs on

Possible Causes

Terminal adapter not communicating with ISDN line

Faulty communication line

Composite link not configured correctly

Solution

1.Verify that the the TA LED is on. If off, ensure that DIP- Switch #2 is set to OPEN (Up).

2.Verify that a cable is connected to the internal composite DSU/TA Digital connector.

3.Verify ISDN configuration. See Composite Link Settings - Internal ISDN in Tabe 7-6.

4.Call Tech Support for assistance (see Chapter 8).

1.Call phone company and verify communication line.

2.Call Tech Support for assistance (see Chapter 8).

1.Verify ISDN configuration, See Composite Link Settings - Internal ISDN in Table 7-6.

2.Call Tech Support for assistance (see Chapter 8).

Flashing RXT LED	High error rate on communication
	line

ISDN clocking configured incorrectly

1.View composite link statistics (refer to Table 7-9).

2.Perform composite link loopback tests (see Diagnostic Testing in Table 7- 12).

3.Call phone company and verify communication line.

4.Call Tech Support for assistance (see Chapter 8).

1.For ISDN line, both terminal adapters should be set for normal clock source.

2.Call Phone company and verify communication line.

3.Call Tech Support for assistance (see Chapter 8).

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