8-7
ISDN Call Waiting
does not work.
ISDN Call Waiting is disabled.
Your ISDN line is not
provisioned for ISDN Call
Waiting
ISDN Call waiting is disabled on Port 2
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.
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.
Cannot place a call
when a Multilink
PPP call is active
(DBA).
DBA is not enabled. 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
incoming voice call
during a Multilink
PPP session.
DBA is not provisioned on
your ISDN line
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
Table 8-1 Symptoms, Causes, and Solutions
Symptom Possible Cause Solution
