Avaya Nortel Communication Server 1000 Manual page 68

68 Features
Voice Gateway Media Cards
The ACF feature does not handle failures of the Voice Gateway functionality
of the Voice Gateway Media Cards.
ELAN and TLAN subnet failures that affect the signaling with the IP Phones
registered to a Voice Gateway Media Card are addressed in the same
manner as failures affecting the Signaling Server. However, if there is a
failure affecting the speech path to an IP Phone, such as when a PBX link
failure occurs and the 10-minute PBX link timer expires, the Voice Gateway
calls are released.
Codecs
Not all the codec properties are restored for the failed-over call. The
following default codec properties are used for the active failover call:
•
•
•
QoS monitoring
The QoS monitoring is always disabled for the failover call. This is only for
the period of the failover call; for all subsequent calls, the QoS monitoring
works as configured.
Virtual Office
Active Call Failover is not supported for the active call from an IP Phone
logged on another IP Phone to a TDM resource or virtual trunk. Such a call
is released when the LTPS detects that the connection to the IP Phone is
lost.
For example, IP Phone A is logged on to IP Phone B and talking to a TDM
resource or a virtual trunk. If a TLAN subnet failure occurs and IP Phone
A re-registers with its home TN, the active call is released as IP Phone A
re-registers.
Handsfree
Scenario: IP Phone A has handsfree denied and IP Phone B has handsfree
allowed. IP Phone A is logged on IP Phone B and talks to IP Phone C
using handsfree.
If a TLAN subnet failure occurs and IP Phone A re-registers with its home
TN (with handsfree disabled), the handsfree functionality is turned off and
IP Phone A must go off-hook to continue the conversation.
Copyright © 2003–2008, Nortel Networks
.
VAD is OFF
G.723 Working Rate is 5.3 kb/s
G.729 Annex is Annex A
Nortel Communication Server 1000
IP Line Fundamentals
NN43100-500 02.02 Standard
Release 5.5 4 February 2008