Deployment Notes - Nortel 1000 Administration Manual

Note

Deployment Notes

between the Application Gateway and one signaling server, which
provides the Application Gateway with information from all
connected call servers.
When a phone connects to the Application Gateway, the Application
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Gateway uses the phone's MAC address to look up the extension in
the map. A phone cannot obtain a license unless the phone's extension
appears in the IP/DN map. Once a phone is licensed, it holds the
license, even when it is idle.
The Application Gateway and its companion voice applications support
multiple phones that share a DN. Each phone sharing a DN appears in the
License Monitor (by MAC address) and can be managed independently.
A licensed phone occupies one session. Refer to the Application Gateway
Release Notes for information on Application Gateway capacity (that is, the
number of concurrent sessions supported).
To support the creation of an IP/DN map, the Application Gateway
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must be on the same LAN segment as the call server. The Application
Gateway must communicate with the call server via its Embedded
LAN (ELAN) to retrieve information for the IP/DN map.
If you want a separate administrator account on the PBX for log ins
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from the Application Gateway, the administrator account requires
overlay 81 and 117 access only. You must also enable multi-user login
on the call server and signaling server. This ensures a speedy and
complete synchronization. Port speed can also impact the integrity of
the data received during synchronization.
When user traffic reaches the concurrent session capacity, you can
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increase capacity by installing additional Application Gateways, all
pointing to the same Nortel Messaging server. Because a load balancer
can handle only HTTP signaling, you will need to configure groups of
phones to use a particular Application Gateway by pointing their
application server setting to the IP address of the Application
Gateway.
Refer to the Application Gateway Release Notes for additional
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information about capacity, deployment, and operation.
Chapter 4 Voice Office Configuration Requirements
Specifying a Source for Phone IP-to-DN Mappings
Application Gateway Administration Guide 47