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. Below is a sample session description from RFC Setting up SIP application composition. An invite-initiated dialog event package for the SIP.
SIP extension for instant messaging. Webarchive template wayback links Articles with short description All articles with unsourced statements Articles with unsourced statements from August Pages using RFC magic links. SIP Extension Header field for registering non-adjacent contacts. Update to the SIP preconditions framework. In both cases, each textual field in the protocol which are not interpreted symbolically by the protocol itself, will be interpreted 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.
RTCP ports for the audio and video streams of andrespectively, are implied. This product complies with standards for SIP applications as noted in the following table. The early session disposition type for the SIP. An offer and answer model with SDP.
New attributes are added to the standard occasionally through registration with IANA. Basic network media services with SIP.
This ffc is originated by the user ‘jdoe’, at IPv4 address Best current practices for third-party call control 3pcc in the SIP. Values are typically a UTF-8 encoding. SIP basic call flow examples. A SIP event package and data format for various settings in support for the push-to-talk over cellular PoC service.
A presence event package for the SIP. A watcher information event template package for the SIP. Implementations are allowed to relax this to omit the carriage return and supply only the line feed. The first one is used in the Session or Media sections to specify another character encoding as registered in the IANA registry  than the default one highly recommended UTF-8 where it is used in standard protocol keys whose values are itf a text intended to be displayed to a user.
This session is specified to last for two hours using NTP timestamps, with a connection address which indicates the address clients must connect to or — when a multicast address ieetf provided, as it is here — subscribe to specified as IPv4 Recipients of this session description are instructed to only receive media.
If the weekly 1-hour session was repeated every Sunday for full one year, i.
SIP torture test messages. The SIP Replace header. Transcoding services invocation in the SIP using third-party call control 3pcc. A mechanism for content indirection in SIP messages. A framework for conferencing with the SIP.
SIP Extension Header field for service route discovery during registration. 2364 message may contain multiple timing and media descriptions. All these offsets are relative to the start time, they are not cumulative. Within an SDP message there are three main sections, detailing the sessiontimingand media descriptions.
Attributes can appear within the Session or Media sections and are scoped accordingly as session-level or media-level.