ADTRAN Express 4100, User Manual

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Chapter 4. Troubleshooting
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IF YOU ARE UNABLE TO CONNECT CALLS
See Table 4-A for corrective actions if you cannot connect calls.
Table 4-1. Troubleshooting Calls
Condition Corrective Action
The PWR LED remains on,
but calls cannot be placed. Most likely a problem exists in the software setup (translation) at
the CO switch, or the network setup in the Express 4100.
Local voice calls can be
transmitted, but data calls to
the same exchange cannot. The line is probably not set up to support data calls.
Local data calls go through,
but long distance data calls
do not. Ensure the far end is working. If not already doing so, place the
call explicitly specifying the prefix of the long distance service
(for example, 10288 for AT&T). If this does not work, then most
likely the problem is that the long distance service provider is not
providing long distance access.
Single B-channel calls can
be made, but two B-channel
calls cannot. There is most likely a problem in the software setup (translation)
at the CO switch, or the network setup in the Express 4100.
If the line has two phone numbers, make sure the second SPID
and LDN are entered correctly in SPID2 and LDN2 in the Express
4100.
Check with the local service provider to ensure that the line sup-
ports two data calls. The Express 4100 status log buffer shows
the sequence of events that occurred. You need to know which
piece of equipment first caused the Multilink PPP process to termi-
nate. The status logs from both ends may be necessary to deter-
mine this.