Nortel Networks NN43011-110 - Manual (Page 31)

The Small System as a branch office 31
Survivable IP expansion
IP Expansions can be configured to be survivable in the event of a link
failure or a catastrophic failure of the Main.
Based on the system configuration, if IP connectivity to the Main is lost or a
manual command is issued, an IP Expansion can enter survival mode, in
which it acts as a fully functional "stand-alone" system.
The number of survivable Expansions allowed on one system is controlled
through a software license called "Survivability", which has a range of 0–4.
The license default value is zero.
Voice distribution over a Campus Data Network
IP expansion connectivity provides a high-capacity, cost-effective solution
that can distribute Small Systems over a high-performance data network.
Full feature functionality and non-blocking architecture is maintained
when systems are distributed over high-performance data networks. This
patented solution delivers the exceptional functionality and reliability of
legacy systems, while delivering the benefits of voice and data convergence.
Packaging requirements
IP connectivity is provided by IP Expansion (IPEX) package 295. If the IP
Expansion package is restricted, IP connectivity between the Main and IP
Expansion is not allowed, whether or not IP daughterboards are connected
to the Main. CE-MUX expansion is not a separately packaged option, but
does depend on IP Expansion (IPEX) package 295.
The Small System as a branch office
The Branch Office feature extends Communication Server 1000 features
from a main office to one or more branch offices. The branch office connects
to the main office over Virtual Trunks on a LAN or a WAN.
A CS 1000M Small System can function as a main office.
With CS 1000 Release 4.5 software, customers can reconfigure existing
satellite Small Systems to function as branch offices to their main office IP
PBX. This configuration allows customers to incorporate systems that were
previously stand-alone into a Branch Office network. In this configuration,
the main office can be any CS 1000S system or CS 1000M Large System or
Small System operating CS 1000 Release 4.5 software. Any single-cabinet
or single-chassis Small System is eligible for conversion to a branch office.
For more information about the Branch Office feature, refer to Branch Office:
Installation and Configuration (NN43001-315).
Nortel Communication Server 1000
Communication Server 1000M and Meridian 1 Small System Overview
NN43011-110 01.01 Standard
Release 5.0 30 May 2007
Copyright © 2003 - 2007, Nortel Networks
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