Network Or Communications Failure; Table 4-5: Network Or Communications Failure Checklist - PictureTel Concorde 4500 Servicing Manual

Network or Communications Failure

Table 4-5: Network or Communications Failure Checklist

If you get
this
message... interface
No Channel V.35,
Connection
RS-449, X.21,
V.25 bis,
Switched-56,
nondialed
This table summarizes the corrective actions that you can follow if
you have network or communications failures.
Type of
network It means...
There may be a
problem with
the network,
Communications
board or the
cables. The
system is not
receiving clock
signals from the
DCE.
Basic Troubleshooting Procedures
Do this...
1. Make sure that all network
connections to the electronics
module are securely attached.
2. Perform a local channel loopback
test: This test checks the audio,
video, and CP boards.
If the test fails, and you know
that the audio and video
boards are working correctly,
you may need to replace the
CP board.
If the test is successful,
continue with the next step.
3. Perform a local loopback test from
the near-end DCE to the
electronics module:
If the test fails, continue with
step 4.
If the test is successful, call
the network provider.
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