Answering Rules
The function “Answering Rules” realizes the full control over your telephone system. Using the answering rules which are often easy by the setting you can make a unique telephone system conforming to your needs, graphs and preferences.
You can direct subscribers on the base of different factors, which will allow your telephone system to realize its functions more efficiently.
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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VOIP PI Co., Limited. is a one of the leading asterisk telephony card manufacturer in china, with passion in supplying open souce hardware.
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