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Building Voip Network with Nortels e-Book


The Nortel Multimedia Communications Server (MCS) 5100 is one of the
first systems to push SIP to the forefront ahead of its competitors in the voice
over IP (VoIP) arena. It takes the best of both worlds from a PBX system and
a computer application system and combines them into the system we will be
looking at throughout this book.This first chapter provides a high-level
overview of what the system is and what it is not, and a look at some of the
major services provided by the MCS 5100.
To understand how this system works and how it operates with other systems,
you need to have somewhat of an understanding of the SIP Protocol
(see Chapter 8). Although the MCS 5100 can also provide and use H.323,
most users and enterprise users are moving to SIP due with is complexity
compared to H.323. Currently there are a few other major players that are
following the lead of Nortel using SIP; for example, Cisco and Microsoft. In
the Microsoft LCS and the new version of Call Manager both have gone to a
SIP-based presence for their clients.
But Nortel has continued to evolve in front of the competitors by
offering more than just a phone and voice mail. It has expanded into other
areas of mobility such as personal digital assistants (PDAs) and wireless clients.
The ability Nortel has to do SIP to endpoints such as those from Polycom
has proven the potential of the MCS 5100 to expand outside the normal
realm of a VoIP PBX.The system has the capability to move communication
toward a single platform.
A group of components and applications that can all work on a single
system provides users and administrators with a better experience than a dispersed
system. An example of this is a user who is on the Nortel PC Client,
using the instant messenger—at the same time he or she can receive and
make calls to others, send files, and perform a whiteboard task. Also the user
could be using a video call between one or more people at the same time. In
a dispersed system a user would have to have three to nine different applications
open at one time to do the same tasks as the MCS 5100.
www.syngress.

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