8-7

 

Table 8-1 Symptoms, Causes, and Solutions

 

 

 

 

 

 

 

 

 

 

Symptom

Possible Cause

Solution

 

 

 

 

ISDN Call Waiting

ISDN Call Waiting is disabled.

ISDN Call waiting is disabled on Port 2

does not work.

 

by default (S76=1). Use terminal

 

 

emulation software to change S76 to

 

 

the appropriate value. Refer to

 

 

Chapter B, “AT Commands, S Registers,

and Result Codes” for the available options.

Cannot place a call when a Multilink

PPPcall is active (DBA).

Your ISDN line is not provisioned for ISDN Call Waiting

DBA is not enabled.

To use ISDN Call Waiting, you must have ACO (Additional Call Offering) provisioned on your line. Contact your telephone company for further assistance.

Note that ACO is not available on a 5ESS Custom switch.

Make sure DBA is enabled by setting S70. Refer to Chapter B, “AT Commands, S Registers, and Result Codes” for the available options.

Cannot receive an

DBA is not provisioned on

incoming voice call

your ISDN line

during a Multilink

 

PPP session.

 

To use incoming DBA, you must have ACO (Additional Call Offering) provisioned on your line. Contact your telephone company for further assistance.

Note that ACO is not available on a 5ESS Custom switch