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F-13160-A2-GB22-10 December 1996
Troubleshooting Table
The
ACCULINK 316x DSU/CSU is designed to
provide you with many years of trouble-free service.
However, Table F-1 gives you some direction if a
problem occurs. For problems other than those listed in
the table, please contact your service representative
immediately (see Chapter 1, Introduction, for more
information).
Table F-1
(1 of 2)
Troubleshooting
Symptom
Possible Cause Solutions
No power 1. The power cord is not securely plugged into
the wall receptacle or rear panel connector.
2. The wall receptacle has no power.
1. Check that the power cord is securely
attached at both ends.
2. Check the wall receptacle power by plugging
in some equipment that is known to be
working.
Power-Up
Self-Test fails
The DSU/CSU has detected an internal hardware
failure.
Contact your field service representative.
Message LOS at
Net appears
1. Network cable problem.
2. No signal is being transmitted at the far-end
DSU/CSU.
3. T1 facility problem.
1. Check that the network cable is securely
attached at both ends.
2. Check far-end DSU/CSU status.
3. Contact your T1 facility provider.
Message LOS at
DTE appears
1. DSX-1 cable problem.
2. No signal being transmitted from the DTE.
1. Check that the DSX-1 cable is securely
attached at both ends.
2. Check the DTE status.
Message OOF at
Net appears
1. Incompatible framing format between the
network and the DSU/CSU.
2. Network cabling problem.
3. T1 facility problem.
1. Check that the framing format for the network
interface is correct.
2. Check that the network cable is securely
attached at both ends.
3. Contact your T1 facility provider.
Message OOF at
DTE appears
1. Incompatible framing format between the
DSX-1 port on the CPE and the DSU/CSU.
2. DSX-1 cabling problem.
1. Check that the framing format for the DSX-1
(DTE) interface is correct.
2. Check that the DSX-1 cable is securely
attached at both ends.
Message
Yellow at Net
appears
1. Network cable problem.
2. Far-end DSU/CSU/DTE has lost framing sync
on the T1 line.
3. T1 facility problem.
1. Check that your network cable is securely
attached at both ends.
2. Check the status of the far-end device.
3. Contact your T1 facility provider.
F