The rise of SIP and IMS

NETWORK WORLD NEWSLETTER: STEVE TAYLOR AND LARRY HETTICK ON
CONVERGENCE
07/18/05
Today's focus: The rise of SIP and IMS

Dear networking.world@gmail.com,

In this issue:

* In the last five years, SIP and IMS have become prominent
* Links related to Convergence
* Featured reader resource
_______________________________________________________________
This newsletter is sponsored by Cisco Systems
TOP MYTHS OF IP COMMUNICATIONS

As more organizations are seeing the value in deploying IP
business communications solutions, including IP telephony,
unified messaging, and audio, video, and Web conferencing,
questions about these technologies have arisen, as well as some
common myths. Get the facts and information that can help you
make an intelligent decision about deploying a converged network

http://www.fattail.com/redir/redirect.asp?CID=108534
_______________________________________________________________
WHAT'S THE WIMAX STORY?

We've all heard the ebb and flow of WiMAX enthusiasm - ranging
from "it'll take over the world" hype to "it's already a bust"
anti-hype, and everywhere in between. If you are curious as to
where WiMax stands or need a refresher on what it is all about,
click here for the WiMAX story:
http://www.fattail.com/redir/redirect.asp?CID=108428
_______________________________________________________________

Today's focus: The rise of SIP and IMS

By Steve Taylor and Larry Hettick

Today we'll continue our retrospective on the past five years in
the world of convergence, this time looking at what has evolved
in the core network. When we started this newsletter five years
ago, we defined one of the faces of convergence as "network
convergence" - defining it as the integration of data and voice
networks' transport and signaling infrastructures in a carrier's
core network.

While it was pretty clear back then that the core was going be
running on an optical infrastructure with an IP overlay, we
weren't quite sure how the many demands of multimedia session
control would be provided. Although Session Initiation Protocol
(SIP) work had begun in the IETF in 1999, since then SIP has
clearly emerged as the protocol of choice for VoIP.

What we didn't foresee was the introduction of IP Multimedia
Subsystem (IMS) as an emerging architecture to provide further
session control. IMS has its roots in the wireless world, and
was created as a concept in 2000. IMS was designed to give 3G
wireless providers a more effective way to offer applications
and content services in multi-vendor, open-standards networks.

It hasn't taken long for both wireless and wireline service
providers to embrace IMS. We expect that wireline operators will
actually be among the heaviest users of IMS, because as they
move forward to offer applications-level support (running on IP)
they will have many millions of simultaneous IP sessions to
control.

Another emerging trend is for fixed and mobile networks to
converge. While mobile networks still carry more voice than data
traffic, broadband access to mobile devices is evolving, and
this evolution will encourage more data applications on mobile
networks. In the next few years mobile networks will have to
transition to an IP-centric core and will look more like today's
fixed-line core networks.

The bottom line: core networks have undergone significant change
in the last five years, enabling more efficient multimedia
services support.

RELATED EDITORIAL LINKS

Test shows VoIP lagging in quality
Network World, 07/18/05
http://www.networkworld.com/news/2005/071805-voip.html?rl
_______________________________________________________________
To contact: Steve Taylor and Larry Hettick

Steve Taylor is president of Distributed Networking Associates
and publisher/editor-in-chief of Webtorials. For more detailed
information on most of the topics discussed in this newsletter,
connect to Webtorials <http://www.webtorials.com/>, the premier
site for Web-based educational presentations, white papers, and
market research. Taylor can be reached at
<mailto:taylor@webtorials.com>

Larry Hettick is an industry veteran with more than 20 years of
experience in voice and data. He is Vice President for Telecom
Services and Infrastructure at Current Analysis, the leading
competitive response solutions company. He can be reached at
<mailto:lhettick@currentanalysis.com>
_______________________________________________________________
This newsletter is sponsored by Hewlett Packard
Special Report-Regulatory Compliance and the Role of Today's CIO

With a growing body of legislation dictating how enterprises may
create, use, share, and retain electronic records, CIOs must
develop data storage and management strategies that meet
regulatory compliance and support their organizations' overall
business goals. Fortunately, these objectives are not mutually
exclusive. Download this Special Report from Kahn Consulting,
click here
http://www.fattail.com/redir/redirect.asp?CID=108652
_______________________________________________________________
ARCHIVE LINKS

Archives of the Convergence newsletter:
http://www.networkworld.com/newsletters/converg/index.html
_______________________________________________________________
The Adaptive WAN for Business-Critical Applications

Discover how enterprises are moving beyond overlapping,
dedicated, single-application networks to a more flexible WAN
architecture that more intelligently uses bandwidth and supports
multiple and time-sensitive applications. Watch the webcast now
for more information.
http://www.fattail.com/redir/redirect.asp?CID=108478
_______________________________________________________________
FEATURED READER RESOURCE
THE ROI OF VOIP

When it comes to VoIP, most network managers are satisfied that
the technology works. But there are questions: What will the new
technology cost to roll out and support, and what benefits can
companies expect to reap? Check out NW's step-by-step guide on
how to determine the true cost and benefits of VoIP. Click here:
<http://www.networkworld.com/research/2005/071105-voip.html>
_______________________________________________________________
May We Send You a Free Print Subscription?
You've got the technology snapshot of your choice delivered
at your fingertips each day. Now, extend your knowledge by
receiving 51 FREE issues to our print publication. Apply
today at http://www.subscribenw.com/nl2

International subscribers click here:
http://nww1.com/go/circ_promo.html
_______________________________________________________________
SUBSCRIPTION SERVICES

To subscribe or unsubscribe to any Network World e-mail
newsletters, go to:
<http://www.nwwsubscribe.com/Changes.aspx>

To change your e-mail address, go to:
<http://www.nwwsubscribe.com/ChangeMail.aspx>

Subscription questions? Contact Customer Service by replying to
this message.

This message was sent to: networking.world@gmail.com
Please use this address when modifying your subscription.
_______________________________________________________________

Have editorial comments? Write Jeff Caruso, Newsletter Editor,
at: <mailto:jcaruso@nww.com>

Inquiries to: NL Customer Service, Network World, Inc., 118
Turnpike Road, Southborough, MA 01772

For advertising information, write Kevin Normandeau, V.P. of
Online Development, at: <mailto:sponsorships@nwfusion.com>

Copyright Network World, Inc., 2005