Resetting The Dsu; Displaying Dsu Identity Information - Paradyne 7520 User Manual

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.
Improper configuration
Bad cable
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 Table 4-3,
Self-Test Results Messages.
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
Reset Device
Identity
May 1998
Solutions
Verify that the DSU is set for the
same rate as your subscriber
loop. (The DSU's rate is
displayed on the Network
Interface Status screen.)
If getting excessive Loop Loss
(dB) indications, install a higher
quality cable. Refer to Table D-2
in Appendix D, pp Model 7520 DSU
LADS Connection LADS Connection Distances Distances.
Verify that the DTE Port specified
(see Table A-3 in Appendix A,
Data Port Options) is the same
one that is physically connected
to a DTE.
Run Loopback tests. Refer to
Running Network Tests
in
Chapter 5.
Reset the DSU and try again.
Contact your service
representative.
7520-A2-GB20-20