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Messages and Troubleshooting
Resetting the DSU
Displaying DSU Identity Information
6-4
Table 6-2. Troubleshooting (2 of 2)
Symptom
Possible Cause
Not receiving data;
DDS line rate/speed has
DSU is not
changed.
responding.
Excessive BPVs causing
DSU to become stuck in
Autobaud mode.
Excessive Loop Loss
causing DSU to become
stuck in Autobaud mode.
Power-Up Self-Test
The DSU has detected an
fails. Only Alarm
internal hardware failure.
LED is on after
power-up.
The DSU can be reset locally or remotely.
To reset the DSU, follow this menu selection sequence:
Main Menu
Control
The DSU reinitializes itself, performing a Device Self-Test. Refer to
Results
Messages, Table 4-3.
To display the DSU's system name, location, contact, serial number, model
number, and software and hardware revision numbers, follow this menu selection
sequence:
Main Menu
Status
March 1997
Solutions
1. Verify that your subscriber loop is
running at 56 or 64 CC kbps.
2. If getting Excessive BPVs, verify
that you do not have a bad cable.
If the cable is good, contact the
network provider.
3. If getting excessive Loop Loss
(dB) indications, install a higher
quality cable. Refer to
in Appendix D,
in Appendix D,
DSU LADS Connection
Distances.
4. If the DDS Line Rate (Kbps) field
shows Autobaud, the DSU may
be stuck in Autobaud mode.
Configure Line Rate (Kbps) for
56 or 64 kbps.
5. Run Loopback tests. Refer to
Running Network Tests
Chapter 5.
Reset the DSU and try again.
Contact your service
representative.
Reset Device
Identity
Table D-2
Model 7510
Model 7510
in of
Self-Test
7510-A2-GB20-00
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Table of Contents
Troubleshooting
