7. Monitoring and Troubleshooting
3160-A2-GB24-10 March 2001 7-17
Mgmt link is down 1. The manager configuration is
mismatched with the
DSU/CSU configuration.
2. The managers link layer
protocol is not running.
1. Check that the configurations
are matched.
2. Start the link layer protocol.
Modem In Use The modem is in use. Redial the phone number later.
No Answer Tone The remote end does not
answer within 45seconds. Redial the phone number later.
No Dial Tone The modem cannot dial because
there is no dial tone. Check that the modem is
connected properly.
No power 1. The power module is not
securely attached.
2. The wall receptacle has no
power.
1. Check the power module
attachment.
2. Check the wall receptacle
power by plugging in some
equipment that is known to be
working.
No SNMP
communication via
the AUX port
(Model 3164)
1. Cable problem.
2. The link layer protocol is not
running.
1. Check that the cable is
securely attached at both
ends.
2. Change the Aux Use
configuration option to None,
and then back to SNMP or
Daisy (as appropriate).
Power-on self-test
fails The DSU/CSU has detected an
internal hardware failure. Contact your service
representative.
OOF at DTE
message appears 1. Incompatible framing format
between the Drop/Insert port
on the customer premises
equipment and the
DSU/CSU.
2. DTE Drop/Insert (DSX-1)
cabling problem.
1. Check that the framing format
for the DTE Drop/Insert
(DSX-1) interface is correct.
2. Check that the DTE
Drop/Insert (DSX-1) cable is
securely attached at both
ends.
OOF at Network
message appears 1. Incompatible framing format
between the network and the
DSU/CSU.
2. Network cabling problem.
3. 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 facility provider.
Table 7-7. Troubleshooting (2 of 3)
Symptom Possible Cause Solutions