This trap/inform is sent to the manager under the
following condidions:
- on incoming calls for each call which is rejected for
policy reasons (e.g. unknown neighbor or access
violation)
- on outgoing calls whenever a call attempt is determined
to have ultimately failed. In the event that call retry
is active, then this will be after all retry attempts
have failed.
- whenever a call connects. In this case, the object
isdnBearerCallConnectTime should be included in the
trap.
Only one such trap is sent in between successful or
unsuccessful call attempts from or to a single neighbor;
subsequent call attempts result in no trap.
If the Dial Control MIB objects dialCtlNbrCfgId and
dialCtlNbrCfgIndex are known by the entity generating
this trap, both objects should be included in the trap
as well. The receipt of this trap with no dial neighbor
information indicates that the manager must poll the
callHistoryTable of the Dial Control MIB to see what
changed.