ADTRAN L128 - Manual (Page 130)

Chapter 4: Troubleshooting
61202.070L1-1 Express L128/L128T 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 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 L128.
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 L128.
If the line has two phone numbers, make sure the second SPID and
LDN are entered correctly in SPID2 and LDN2 in the Express L128.
Check with the local service provider to ensure that the line supports
two data calls. The Express L128 status log buffer shows what
sequence of events occurred. What you need to know is which
piece of equipment first caused the Multilink PPP process to termi-
nate. The status logs from both ends may be necessary to determine
this.