SIP

SIP (Session Initiation Protocol) is an IP telephony signaling protocol developed by the IETF. SIP is a text-based protocol that is suitable for integrated voice-data applications. SIP is designed for video, voice and data transmission and uses fewer resources and is considerably less complex than H.323.

VoIP

VoIP (Voice Over IP) is a set of technologies that enables voice, data and video collaboration over existing IP-based LANs, WANs, and the Internet. VoIP uses open IETF and ITU standards to move multimedia traffic over any network that uses IP.

MIPS

MIPS (Millions of Instructions Per Second) is a measurement generally used to describe the speed of computer systems, and in some cases, the speed of a given algorithm or program. As a rule of thumb, lower MIPS for an algorithm’s implementation is desirable when used in mobile handsets with limited resources and battery life considerations.

RTP

RTP (Real Time Transport Protocol) is an IP protocol that supports real-time transmission of voice and video. It is widely used For VoIP. RTP is sent over unreliable communication channels, where data may be lost, delayed or re-ordered.

H.264

Also known as MPEG-4 Part 10, or Advanced Video Coding. H.264 is a digital video codec standard which is noted for achieving very high data compression. Technically identical to the ISO/IEC MPEG-4 Part 10 standard (formally, ISO/IEC 14496-10).

CIF

CIF (Common Intermediate Format) is a standard video format used in video conferencing. CIF is defined in a resolution of 352 by 288 pixels.

3G

Third Generation Mobile System – The generic term for the next generation of mobile wireless communications networks.

PSTN

PSTN (Public Switched Telephone Network) is the worldwide voice telephone network. Once only an analog system, most telephone networks today are digital. In the US, most of the remaining analog lines are the ones from your house or office to the telephone company’s central office.

SigComp

SigComp (Signaling compression) is a specification defined in RFC 3320, which enables compressing messages generated by application protocols such a SIP.

IMS

IMS (IP Multimedia Subsystem) is a standardized Next Generation Networking (NGN) architecture for telecom operators that want to provide mobile and fixed multimedia services. It uses a VoIP implementation based on a 3GPP standardized implementation of SIP and runs over the standard Internet Protocol (IP). It supports both packet-switched and circuit-switched existing phone systems. The aim of IMS is not only to provide new services but all the services, current and future, that the Internet provides. IMS uses open standard IP protocols, defined by the IETF. IMS truly merges the Internet with the cellular world; it uses cellular technologies to provide ubiquitous access and Internet technologies to provide appealing services. Because it is access network independent, IMS enables converged fixed mobile network.

TISPAN

Telecoms & Internet Converged Services & Protocols for Advanced Networks. Formerly Telecommunications and Internet Protocol Harmonization Over Networks (TIPHON) is a standardization body of ETSI, specializing in fixed networks and Internet convergence.

3GPP

3GPP (Third Generation Partnership Project) is a body comprising several organizational partners working to produce technical specifications for a third-generation mobile system based on GSM core networks and the radio access technologies they support known as WCDMA (UMTS).

WiMAX

WiMAX (Worldwide Interoperability for Microwave Access) was defined to promote conformance and interoperability of the IEEE 802.16 standard. The Forum describes WiMAX as “a standards-based technology enabling the delivery of last mile wireless broadband access as an alternative to cable and DSL.”

XCAP

XCAP (XML Configuration Access Protocol) allows a client to read, write and modify application configuration data, stored in XML format on a server. XCAP maps XML document sub-trees and element attributes to HTTP URLs, so that these components can be directly accessed by HTTP.