ADTRAN Express XL, Руководство пользователя

Страница: 129 / 187

Chapter 4: Troubleshooting
61200070L1-1 Express XL/XLT User Manual 113
IF YOU ARE UNABLE TO CONNECT CALLS
See Table 4-A for corrective actions if you cannot connect calls.
Table 4-A
Troubleshooting Calls
Condition Corrective Action
The Loop 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 XL.
Local voice calls can be trans-
mitted, 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 exam-
ple, 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 XL.
If the line has two phone numbers, make sure the second SPID and
LDN are entered correctly in SPID2 and LDN2 in the Express XL.
Check with the local service provider to ensure that the line supports
two data calls. The Express XL status log buffer shows what sequence
of events occurred. What you need to know is which piece of equip-
ment first caused the Multilink PPP process to terminate. The status
logs from both ends may be necessary to determine this.