An integrated network for telecommunications carriers that uses the IP protocol as its foundation for packetized voice, video and data. Supporting voice over IP (VoIP) in all its flavors (SIP, H.323, MGCP, etc.), the IP Multimedia Subsystem (IMS) is designed to interface with the PSTN and provide traditional telephony services such as 800 numbers, caller ID and local number portability.
Converged Wireless and Wireline
Part of the 3GPP project, the IMS was conceived to offer full support for every type of communications session in today's world whether over wireless or landline, including instant messaging (IM), push-to-talk, videoconferencing and video-on-demand (VOD). It is the 21st century initiative for carrier networks supporting IP convergence. See LTE, 3GPP, VoIP and IP on Everything.
Converged Wireless and Wireline
Part of the 3GPP project, the IMS was conceived to offer full support for every type of communications session in today's world whether over wireless or landline, including instant messaging (IM), push-to-talk, videoconferencing and video-on-demand (VOD). It is the 21st century initiative for carrier networks supporting IP convergence. See LTE, 3GPP, VoIP and IP on Everything.
 | Reproduced with permission from Computer Desktop Encyclopedia. Copyright (c) 1981-2009 The Computer Language Company Inc. All rights reserved. |
Additional Resources
- Addressing Video Processing Challenges with the IP Mulitimedia Subsystem
- The market place is demanding video content at a rapid rate. For mobile handset users, the challenge of having video on their handsets has been hampered by the handsets' limited bandwidth access and processing power to convert between the many formats available. This white paper discusses how the IP Multimedia...
- White papers 2008-09-01
- Setting the Stage for IP Multimedia Services
- This whitepaper explains how operators can deliver new IP multimedia and converged services incrementally, so they can increase revenue now and grow toward a complete IP Multimedia Subsystem over time.
- White papers 2008-08-01
- Transforming Networks With SIP Trunking: Enabling Cost-Effective Communications and New Services for Small and Medium Businesses (SMBs)
- The Internet is critical for SMBs. They use it for e-mail, to publish information online and for e-commerce. But SMBs have been hesitant to adopt the Voice over Internet Protocol VoIP communications that the Internet enables. Now, a combination of public network transformation, new information and communications technology ICT solutions...
- White papers 2008-05-30
- Setting the Stage for IP Multimedia Services: Using a Service Delivery Platform and Standards-Based Information Technology
- Technology provides the foundation for the communications industry, but sometimes it can get in the way of a great idea. To help Communication Service Providers CSPs integrate and orchestrate IP-based multimedia services across disparate network domains, an architectural framework called IP Multimedia Subsystem IMS was introduced to the communications industry....
- White papers 2008-05-08
- Telecommunications Fundamentals
- View Available Dates and Locations A new era in telecommunications has exploded with the adoption of Voice over IP VoIP, third generation (3G) mobile, and next-generation voice and data services. Telecom is undergoing a series of radical changes which is molded by the legacy of telephony...
- Training 2008-01-01
- Audio glitching - Common under Vista, not so bad under other OSes
- Audio glitching - Common under Vista, not so bad under other OSesYou may be right about the MacBut everyone knows that Linux is useless for multimedia. We've known for at least ten years that MS has vastly better audio performance than Linux, as proven by comparisons between MSWin98 on...
- Discussion threads 2007-11-01
- ENUM Use and Management for the Successful Deployment of ENUM-Enabled Services: Understand ENUM and Its Deployment to Insure Success of Your VoIP and Other ENUM-Enabled
- With today's increased focus on convergent technologies, such as IP Multimedia Subsystem IMS networks, and the increased use of Voice over IP VoIP and other IP-based services like Multimedia Messaging Service MMS, fast, easy and reliable administration of IP addresses and Domain Name System DNS services is quickly becoming a...
- White papers 2007-11-01
- Enabling Service Innovation: Maximizing Assets and Revenue in a Changing Network Environment
- Telecommunications technologies and network architectures are constantly changing. This means that Telecommunications Service Provider TSP executives must make business decisions about products, services and markets against a moving target of network technologies and business and service strategies. In this unstable environment, strategic decisions are therefore often made without knowing how...
- White papers 2007-06-15
- Signalling Cases and QoS Management Within TISPAN NGN Residential Environments
- The TISPAN group from ETSI is currently working on the specification a Next Generation Network NGN, based on the IP Multimedia Subsystem IMS as the service control architecture. This NGN provides a extensible platform that supports the delivering of next generation multimedia services with QoS requirements over multiple access network...
- White papers 2007-04-01
- Alcatel-Lucent AVP: Ray Gilbert - Transcript
- Dan Farber: Ray, thanks for joining me.Ray Gilbert: It's great to be here.Dan Farber: Now as someone who's deeply involved in talking to CIO’s about networking, what are you hearing from them? Are they really confused about telecom?Ray Gilbert: Well there are a lot of...
- Blog posts 2007-03-13
- Alcatel-Lucent AVP: Ray Gilbert - Transcript
- Dan Farber: Ray, thanks for joining me. Ray Gilbert: It's great to be here. Dan Farber: Now as someone who's deeply involved in talking to CIO’s about networking, what are you hearing from them? Are they really confused about telecom?...
- Blog posts 2007-03-13
- Dual Mode Service: Learning From Integrating an IP Multimedia Subsystem Service Into Existing Live Networks
- The IP Multimedia Subsystem IMS is an open, standards-based solution for delivering advanced communications services over IP networks. One such service is the Dual Mode Service DMS, that allows a subscriber to roam across multiple access networks, including Wi-Fi and macro-cellular, using a Dual Mode Handset DMH. In addition, fixed...
- White papers 2007-03-10
- Application-Level QoS Negotiation and Signaling for Advanced Multimedia Services in the IMS
- The IP Multimedia Subsystem IMS has been recognized as a reference next generation network architecture for offering multimedia services over an Internet Protocol IP based infrastructure. One of the key benefits of the IMS is efficient and flexible introduction of new services and access to third-party application providers, thanks to...
- White papers 2007-02-04
- Cisco Service Exchange Framework Enables Compliance With Wireline TISPAN Standards
- This paper describes the Cisco IP NGN architecture and the Service Exchange Framework's alignment with the Telecommunication and Internet Converged Services and Protocols for Advanced Networking TISPAN standards. Cisco IP NGN value-added features including flexible support for IP Multimedia Subsystem IMS and non-IMS applications and multilayered intelligence is discussed. These...
- White papers 2007-02-01
- Diameter Agents in NGN Networks
- The Diameter protocol was derived from the Remote Authentication Dial-In User Service RADIUS protocol with many improvements in different aspects, although initially defined by IETF; Diameter was embraced by 3GPP and ETSI and adopted as the foundation for all Authentication, Authorization, and Accounting AAA functionalities in their defined Next Generation...
- White papers 2007-01-28
- IMS: a reality check
- Yesterday at the Internet Telephony Conference & Expo in Fort Lauderdale, I was privileged to be on a panel entitled: Quo Vadis? An IMS Industry Round Table.OK, basics first. In this meaning, IMS refers to IP Media Subsystem, a type of next-generation architecture for mobile communications providers and carriers...
- Blog posts 2007-01-25
- Towards Stateless Core: Improving SIP Proxy Scalability
- The Third Generation Partnership Project (3GPP) specified the IP Multimedia Subsystem IMS standard. This standard uses the Session Initiation Protocol SIP to setup and teardown multimedia sessions through a potentially large chain of proxies. The IMS standard allows some core elements to be deployed as transaction stateful or stateless proxies....
- White papers 2007-01-10
- The IP Multimedia Subsystem (IMS) - An Introduction
- The third Generation of mobile networks (3G) is fast becoming a reality. One goal of 3G is to deploy a ubiquitous core network infrastructure which will provide a seamless blended service experience, extending sophisticated multimedia applications to the user. Ultimately, this network will support converged applications that meld wireless, wireline,...
- White papers 2006-12-12
- Supporting the IP Multimedia Subsystem for Mobile, Wireline, and Cable Providers
- Today's digital-age consumers demand much more than faster network access and service reliability. The empowered subscriber requires ubiquitous access, personalization, and rich connected experiences that they can control and share. Subscribers connect to an array of services through a wide spectrum of both wired and wireless access mediums. This paper...
- White papers 2006-12-01
- Latency Comparison Between HyperTransport and PCI-Express in Communications Systems
- Communication systems with real-time performance and ultra low latency have the potential to transform user experiences and create new business opportunities for network operators and service providers. From faster and more responsive games to converged voice, video and data services, communication systems will be the vehicle for new revenue streams...
- White papers 2006-10-24
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