Adtran 4120 Manual Do Utilizador

Chapter 4.  Troubleshooting

4-6

Express 4110/4120 User Manual

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See Table 4-A for corrective actions if you cannot connect calls.

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 4110/4120.

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 4110/
4120.

If the line has two phone numbers, make sure the second SPID 
and LDN are entered correctly in SPID2 and LDN2 in the Express 
4110/4120.

Check with the local service provider to ensure that the line sup-
ports two data calls. The Express 4110/4120 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 
terminate. The status logs from both ends may be necessary to 
determine this.