Network Or Communications Failure; Table 8-5: Network Or Communications Failure Checklist - PictureTel Concorde 4500 Administrator's Manual

Network or Communications Failure

Table 8-5: Network or Communications Failure Checklist

Message that
appears on the
PictureTel
screen
No Channel
Connection
The following table summarizes the corrective actions that you can
take if you have network or communications failures.
Type of
network It means...
interface
V.35, There may be a
RS-449, problem with
X.21, V.25 bis the network or
with the cables.
The system is
not receiving
clock from the
network.
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:
If the test fails, replace the
appropriate 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.
4. Move the data channel cable from
one channel to the other, and redo
the local loopback of the near-end
DCE:
If the test fails, repair the
DCE.
If the test is successful, you
may need to replace the
Communications board.
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