Avaya Nortel Communication Server 1000 Manual page 75

On a system running CS 1000 Release 4.5, or later software, every node
running the CS 1000 Release 4.5 or later LTPS software has the ACF
feature enabled for the IP Phones that register to it.
Configurable RUDP Timeout and Retries Count
When a network failure occurs and the IP Phone connection is lost, the IP
Phone does not instantly start the failover process. The IP Phone waits for
a length of time for a reply from the server (the length of time is the value
of RUDP timeout in ms). If the IP Phone does not receive a reply from the
server in that length of time, the IP Phone retransmits the message. The IP
Phone retransmits the message for the number of times of the Retries count
value, and then starts the failover process: the IP Phone tries to reconnect
to S1, then to S2 and so on.
Previously, the RUDP timeout was hard-coded to 500 msec, which meant
that the IP Phone detected the connection failure after a 5-second delay,
and Retries count was hard-coded to 10 retries. During that time, the IP
Phone appeared frozen to the user. Now the time-out and number of retries
can be configured in the OAM and PDT shells of the Signaling Server. See
Table 17 "RUDP Timeout and Retries Count commands" (page
Table 17
RUDP Timeout and Retries Count commands
Command
usiSetPhoneRudpRetries
usiGetPhoneRudpRetries
If the customer has a network with low network delays, one or both parameters can be reduced to
make an IP Phone more responsive to failures. If the network delay values are high, the parameters
can be increased to prevent the IP Phones from being reset due to significant network delay.
Copyright © 2003–2008, Nortel Networks
.
Description
Configure the RUDP Retries Count maximum
for IP Phones
1 – (10) – 20
Display the RUDP Retries Count maximum for
IP Phones
Nortel Communication Server 1000
IP Line Fundamentals
NN43100-500 02.02 Standard
Release 5.5 4 February 2008
Active Call Failover for IP Phones 75
75).