VoIP Express Ltd Hong Kong

We offer everything you need for broadband telephony, including broadband from us designed for IP calling. Vanilla broadband will not give you the service you need and your customers expect. So choose a service designed for that high quality calling exper

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General office

VoIP Express Ltd
1601-1603 Kinwick Centre
Central Hong Kong
Hong Hong ,none
Hong Kong

Phone: +44 (0) 207 112 0207
Site: http://www.voip-express.net

Contact Person

Graham Bailey / Technical Consultant
Phone: +44 (0) 207 112 0207

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SIP VoIP Gateway
Termination
Voice and Video Conferencing

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SDP Protocols Are Used To Transmit Media Session Information

In 1998, the Internet Engineering Task Force (IETF) published the specification for a Session Description Protocol or SDP as a format that describes parameters for streaming media. The original IETF Proposed Standard was updated in 2006 as RFC 4566. Although the SDP was created as a feature of Session Announcement Protocol (SAP), it can be used with Real-time Transport Protocol, Real-time Streaming Protocol (RTSP), and Session Initiation Protocol, as well as a standalone protocol. Parameter negotiation, session announcement and session invitation are included in the descriptive sessions from the SDP protocol. Rather than transmit data like other types of protocols, an SDP negotiates between media type endpoints, format and properties involved. A session begins when a connection is established, and the session is terminated only after every endpoint is no longer participating.

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