MAX Administration Guide
6-1
6
Administering ISDN
In addition to observing a MAX unit’s indicator lights to gather information about the
performance of the unit’s ISDN adapters and links, you can display information to resolve
WAN calling errors that occur in outbound Net/BRI calls and to troubleshoot BRI interface
problems. You can also display ISDN (including E1 ISDN) call information and use ISDN
Cause codes to troubleshoot the performance of a MAX unit.
Troubleshooting BRI interface problems
Problems sometimes encountered with BRI interfaces include calls not dialed or answered
reliably, Net/BRI lines not dialing or answering calls, apparent logical-link failures, and WAN
calling errors in netbound Net/BRI calls.
WAN calling errors in outbound Net/BRI calls
Should you encounter a problem in which the Call Status window immediately indicates a
WAN calling error when the MAX places a call on a Net/BRI module. Proceed as follows:
1
Check the value of the Data Svc parameter in the Call or Connection profile.
Try both the
64K
and
56K
options for Data Svc, to see whether using a different value
solves the problem.
2
Verify that you are using the correct dialing plan.
Depending on how the BRI lines are configured, you might need to type four, seven, or ten
digits to communicate with the remote end.
Four-digit dialing involves the last four digits of your phone number. For example, if your
phone number is (415) 555-9015, four-digit dialing requires that you enter only the last
four digits: 9015. Seven-digit dialing specifies that you dial the digits 5559015, and
ten-digit dialing requires 4155559015.
If you are sending the incorrect number of digits, the MAX cannot route the call. Ask your
carrier representative for the correct dialing plan, or simply try all of the possibilities.
3
Ask your carrier representative to verify explicitly that the line is capable of supporting
the call types you are requesting.
Troubleshooting BRI interface problems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
