Nortel Networks NN43001-121 - Manual (Page 42)

42 Planning and engineering
The Signaling Server, OCS Proxy server (which runs MCM), OCS 2007
Front End server, and Active Directory are separate. The number of
Signalling Server(s), OCS 2007 Proxies, and OCS 2007 Front End servers
required for each customer are the same as if each customer were part of a
single system. However, the total number of users allowed for the CS 1000
is the total number of users for all customers.
Multiple location network
The following diagram shows the path of an inbound and outbound call in a
multiple location network configuration in a single forest deployment. The
MCM routes inbound calls from the Signaling Server to the appropriate
Mediation Server within the Mediation Server pool. When the current
Mediation Server does not answer, MCM jumps to the next Mediation Server.
Figure 14
Multiple location network
For regional or multiple location deployments, it is required to install
SPS/SRS. Two Primary/Secondary SPS/SRS may co-exist within one
configuration to improve the system’s robustness. In the previous versions
of the program, the MCM performs polling by sending SIP OPTION request
to determine which SPS/SRS is active. The active SPS/SRS becomes the
last one to send an OK response. The SIP Proxy Server (SPS) sits between
MCM and the TR\87 FE application that reside on CS 1000. This SIP
proxy allows communication between the CS 1000 and OCS when different
transport protocols (TLS and TCP) are used. An OCS configuration with
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
.