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Nortel Networks NN43001-121 Single node Redundancy, Campus redundancy, Geographic redundancy

Models: NN43001-121

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78 Planning and engineering

Systems, platforms, and applications

Interoperable

Supported

 

 

 

AT&T SIP trunk

Y

N

 

 

 

Broadsoft

Y

N

 

 

 

ACME SBC

Y

N

 

 

 

3100 Mobile Communication Gateway

Y

N

 

 

 

Redundancy

Remote Call Control (RCC) services are supported (with limitations) in the following scenarios:

•Single node redundancy

•Campus redundancy

•Geographic redundancy

Single node Redundancy

The same master and follower mechanism used for Virtual Trunk (VTRK) and TPS applications is used to support redundancy within a node for RCC. After the master of the node fails, one of the followers takes over the node IP and continues to deliver service. VoIP mode session state is preserved when a new master is elected.

Redundancy across multiple nodes is possible using the Least Cost Routing feature of NRS. When considering a multinode redundant configuration, see the restrictions on establishing TR/87 sessions from multiple nodes that have AML links to a single Call Server. For more information, see "Capacity planning" (page 46) .

Campus redundancy

Campus Redundancy increases the distance between the two CPU cores of CS 1000E.

The CS 1000E is the only large system that supports this feature.

Geographic redundancy

Geographic Redundancy can be supported with the limitations that currently exist for SIP gateway SIP traffic. The main impacts are.

•During transition periods, situations can arise where IP phones are registered to a Call Server that is different from the call server that provides support for the TR/87 FE. In this situation, TR/87 support is undefined. TR/87 clients can register successfully; however, the status of the IP Phone is impacted by any actions performed on the telephone or the TR/87 client, as the FE and IP Phone interface different Call Servers. NRS is required to support redundancy.

Nortel Communication Server 1000

Nortel Converged Office Fundamentals — Microsoft Office Communications Server 2007

NN43001-121 01.03 Standard

Release 5.0 30 April 2008

Copyright © 2005–2008, Nortel Networks

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Page 78
Image 78
Nortel Networks NN43001-121 manual Single node Redundancy, Campus redundancy, Geographic redundancy
Page 77 Page 79