Alan Freedman -- The Computer Language Company - Computer Desktop Encyclopedia
Computer Desktop Encyclopedia
Longest-Running Tech Reference on the Planet

A CDE Definition

You'll love The Computer Desktop Encyclopedia (CDE) for Tech Term of the Day (TTOD)


IP Multimedia Subsystem

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.

Personal Use Only

Before/After Your Search Term
IP faxIP network
IP filterIP number
IP fragmentationIP on Everything
IP gatewayIP over coax
IP layerIP over SONET
IP loopback addressIP PBX
IP managementIP phone
IP/MPLS coreIP port
IP multicastIP port number
IP multicast addressIP protocol

Terms By Topic
Click any of the following categories for a list of fundamental terms.
Computer Words You Gotta KnowSystem design
Job categoriesUnix/Linux
Interesting stuffPersonal computers
InternetIndustrial Automation/Process Control
Communications & networkingAssociations/Standards organizations
HistoryDesktop publishing
ProgrammingHealthcare IT
System design