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7. ISDN Events and Errors
329
Termination Event Returned After: Indicates: Refer-
ence:
for the call has been
acknowledged by the
network. This event
is used only with the
AT&T Vari-A-Bill
feature.
CCEV_ SETCHANSTATE
cc_SetChanState( )
The B channel is
placed in the
requested state.
Line
Device
Handle
CCEV_STOPTONE
cc_StopTone( )
The tone operation
was terminated.
Line
Device
Handle
CCEV_STOPTONEFAIL Failure of
cc_StopTone( )
The request to
terminate the playing
of a tone failed.
Line
Device
Handle
CCEV_TASKFAIL A request or message
from the application is
rejected by the
firmware.
Rejection of a request
or message.
Normally, this event
is triggered by an
incorrect function
call during the call.
This event can also
be received due to
“race conditions,”
meaning that the
application and the
network requested
different actions from
the firmware at the
same time. The
application may use
cc_Restart( ) after
this event is received
to reset the channel.
CRN or
Line
Device
Handle