Avaya Nortel Communication Server 1000 Manual page 196

196 Features
with a 3-digit Node ID can register to a node that is configured with a 4-digit
Node ID. To enable the registration to be successful, the 3-digit Node ID
must match the first 3 digits of the node 4-digit Node ID.
This feature enhances the IP Phone survivability in the case of network
outages or equipment failure, as it allows an IP Phone to register to more
than one node on a system. By configuring the IP Phone S1 and S2
Connect Server IP addresses to the node addressees of two different
nodes, and properly configuring the Node IDs, the IP Phone is able to
register to another secondary node if it cannot register to the primary node.
The rules are as follows:
•
•
Up to 10 nodes can be configured on a system (3-digit Node ID base + 0-9
for the fourth digit). The IP Phones are distributed among the nodes by
programming different S1 and S2 IP addresses into the IP Phones. The
IP Phones register to the primary Connect Server (the S1 IP address) if
possible.
If a network outage or equipment failure prevents the registration to the
primary Connect Server, the IP Phone can register to a secondary Connect
Server (the S2 IP address). This feature enables a node registered IP
Phones to spread across the spare IP Phone registration capacity of the
other nodes in the system in the event of a network outage or equipment
failure.
Example:
For example, the installer configures two nodes on a system with Node IDs
3431 and 3432. An IP Phone configured with Node ID 343 can register
with either node.
If the IP Phone presented one of the following Node IDs, it would be rejected
for registration
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Copyright © 2003–2008, Nortel Networks
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if the Node ID on the system has 3 digits or less, the Node ID from
the IP Phone must match exactly
if the Node ID on the system has 4 digits and:
— the Node ID from the IP Phone has fewer than 3 digits, reject the
registration
— the Node ID from the IP Phone has 4 digits, the Node ID must match
exactly
— if the Node ID from the IP Phone has 3 digits and they match the
first 3 digits of the node 4 digit Node ID (left to right), then allow
the IP Phone to register. If the first three digits do not match, reject
the registration.
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Nortel Communication Server 1000
IP Line Fundamentals
NN43100-500 02.02 Standard
Release 5.5 4 February 2008