Avaya Nortel Communication Server 1000 Manual page 73

The TLAN comes up again and the IP Phone re-registers. Although the IP
Phone is now idle and the display is cleared, the IP Phone can resume
dialing the DN starting from the second digit. The IP Phone can also return
to the held call by pressing the held call DN key.
CDR
No ACF-specific information is added to the Call Detail Record (CDR)
records.
In the case of Call Server failure, the CDR records for the call before
the failure occurred are lost. CDR is restarted as the active IP Phone
re-registers. Therefore, the records are generated only for the post-failure
period of time.
In the case of the LTPS or network failure, CDR continues. The CDR is
then stopped only if:
•
•
•
The records include the failover time as well. This means that the user
can be under-charged in case of Call Server failure and over-charged in a
case of LTPS/network failure.
CallPilot
ACF considers CallPilot to be a TDM resource and interaction of an IP
Phone with CallPilot as an IP/TDM call. See
Table 16 "ACF behaviors" (page
Example: IP Phone A calls telephone B and is redirected to CallPilot on
no answer. The IP/TDM call is established between the IP Phone A and
CallPilot.
The media session between IP Phones and CallPilot is dropped due to INI,
which can be initiated by, for example, cold start, warm start, or ungraceful
switchover.
Note that during any failure, user input is not passed to CallPilot. The user
must resume entering responses after the IP Phone re-registers.
Interactions considered as IP/TDM calls
The ACF feature also considers interaction of an IP Phone with the following
to be an IP/TDM call:
•
•
Copyright © 2003–2008, Nortel Networks
.
the Call Server supervisory timer expires
the IP Phone is idle when it re-registers
the active IP Phone re-registers and then the call is released
CallPilot Mini
Meridian Mail
Nortel Communication Server 1000
IP Line Fundamentals
NN43100-500 02.02 Standard
Release 5.5 4 February 2008
Active Call Failover for IP Phones 73
"IP/TDM calls" (page 66)
61).
and