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ACCULINK 316x DSU/CSU
4-12 January 1997 3160-A2-GB21-50
Table 4-6
(2 of 2)
Troubleshooting
Symptom SolutionsPossible Cause
Message
AIS at DTE
appears
DTE is sending an AIS. Check the DTE.
Message EER at
Net appears
Facility problem. Contact your facility provider.
BPV LED is ON 1. Incompatible line coding format between the
DTE and the DSU/CSU.
2. DTE Drop/Insert (DSX-1) cable problem.
1. Check that the line coding format for the DTE
Drop/Insert (DSX-1) interface is correct.
2. Check that the DTE cable is securely attached
at both ends.
A failure message
appears followed
by an 8-digit code
(
x
x
x
x
x
x
x
x
)
Internal DSU/CSU problem. Record the 8-digit code, then contact your
service representative.
Mgmt link is down 1. The manager configuration is mismatched with
the DSU/CSU configuration.
2. The manager’s link layer protocol is not
running.
1. Check that the configurations are matched.
2. Start the link layer protocol.
No SNMP
communication
via the AUX port
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).
Invalid Number The modem cannot dial because the phone
number is invalid or there is no number in the
selected directory.
Check that the selected phone number is correct.
No Dial Tone The modem cannot dial because there is no dial
tone.
Check that the modem is connected properly.
Busy Signal The modem is receiving a busy signal. Redial the phone number later.
No Answer Tone The remote end does not answer within
45 seconds.
Redial the phone number later.
Modem In Use The modem is in use. Redial the phone number later.