Canonical URL: ; File formats: Plain Text PDF Discuss this RFC: Send questions or comments to [email protected] The Session Description Protocol (SDP) is a format for describing streaming media communications parameters. The IETF published the original specification as an IETF Proposed Standard in April , and subsequently published a revised specification as an IETF Proposed Standard as RFC in July . “An Offer/Answer Model with the Session Description Protocol(RFC ). SIP Configuration Guide, Cisco IOS Release 15M&T-Achieving SIP RFC Compliance. (SDP), as defined in the IETF specification, RFC , An Offer/ Answer.
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Indicating user agent capabilities in the SIP. Its name is “SDP Seminar” and extended session information “A Seminar on the session description protocol” is included along with a link for additional information and an email address to contact the responsible party, Jane Doe.
When repeat times are specified, the start time of each repetition may need to be adjusted so that it will occur at the same local time in a specific timezone throughout the period between the start time and the stop time which are still specified in NTP format in an absolute UTC timezone.
The fields present in their values are considered in the protocol as opaque strings, they are used as identifiers, just like paths in an URL or filenames in a file system: A mechanism for content indirection in SIP messages. A watcher information event template package for the SIP. For example, to schedule the same event also on Saturday at the same time of the day you would use:.
Session Description Protocol
Views Read Edit View history. Recipients of this session description are instructed to only receive media. A session is described by a series of fields, one per line. Private SIP extensions for media authorization. SDP uses attributes to extend the core protocol.
RFC – An Offer/Answer Model with Session Description Protocol (SDP)
If the weekly 1-hour session was repeated every Sunday for full one year, i. Values are typically a UTF-8 encoding. The early session disposition type for the SIP. Best current practices for third-party call control 3pcc in the SIP. Note also that sessions may be repeated irregularly over a week but scheduled the same way for all weeks in the period, by adding more tuples in the r parameter.
This product complies with SIP standards as noted in the following table.
The SIP Replace header. Within an SDP message there are three main sections, detailing the sessiontimingand media descriptions. SDP is designed to be extensible to support new media types and formats.
SIP industry standards compliance
SIP Extension Header field for registering non-adjacent contacts. Private SIP proxy-to-proxy extensions for supporting the PacketCable distributed call signaling architecture.
Setting up SIP application composition. In both cases, each textual field in the protocol which are not interpreted symbolically by the protocol itself, will be rfv as opaque strings, but rendered to the user or application with the values indicated in the last occurrence of the charset and sdplang in the current Media section, or otherwise their last value in the Session section.
A presence event package for the SIP. Retrieved from ” https: Transcoding services invocation in the 3246 using third-party call control 3pcc. Early media and ringing tone generation in the SIP. The set of properties and parameters are often called a session profile. Thus an hour meeting from 10am UTC on 1 Augustwith a single repeat time a week later at the same time can be represented as:.
A framework for conferencing with the SIP.