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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SIP industry standards compliance

Indicating user agent capabilities in the SIP. A 32264 for content indirection in SIP messages. Instead of specifying this timezone and having to support a database of timezones for knowing when and where daylight adjustments will be needed, the repeat times are assumed to be all defined within the same timezone, and SDP supports the indication of NTP absolute times when a daylight offset expressed in itef or using a type time will need to be applied to the repeated start time or end time falling at or after each daylight adjustment.

Webarchive template wayback links Articles with short description All articles with unsourced statements Articles with unsourced statements from August Pages using RFC magic links.

A framework for conferencing with the SIP. This session is originated by the user ‘jdoe’, at IPv4 address Update to the SIP preconditions framework. Basic network media services with SIP.

This product complies with standards for SIP applications as noted in the following table. Integration of resource management and SIP. Ieft invite-initiated dialog event package for the SIP. Ietd ports for the audio and video streams of andrespectively, are implied.

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. SDP does not deliver any media by itself but is used between endpoints for negotiation of media type, format, and all associated properties.


Browse all SIP topics. When repeat times are specified, the 2364 time of each repetition may need to be adjusted so rdc 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.

Information on RFC ยป RFC Editor

Each message may contain multiple timing and media descriptions. A presence event package for the SIP. Transcoding services 2364 in the SIP using third-party call control 3pcc. Compliance with standards for SIP applications. Reliability of provisional responses in SIP. Rfx first one is used in the Session or Media sections to specify another character encoding as registered in the IANA registry [5] than the default one highly recommended UTF-8 where it is used in standard protocol keys whose values are containing a text intended to be displayed to a user.

The SIP Refer method. An offer and answer model with SDP. The set of properties rffc parameters are often called a session profile. This product complies with SIP standards as noted in the following table.

Session Description Protocol

SIP torture test messages. SIP Extension Header field for registering non-adjacent contacts.

SDP uses attributes to extend the core protocol. However, support for RFC comes with the following limitations: Attributes can appear within the Session or Media sections and are scoped accordingly as session-level or media-level. Multiple dialog usages in SIP. A watcher information event template package for the SIP. SDP is used for describing multimedia communication sessions for the purposes of session announcement, session invitation, and parameter negotiation.

The early session disposition type for the SIP. The SDP specification does not incorporate any transport protocol; it is purely a format for session description.

Implementations are allowed to relax this to omit the carriage return and supply only the line feed. SDP is designed to be extensible to support new media types and formats. Early media and ringing tone generation in the SIP.


From Wikipedia, the free encyclopedia. A message summary and message waiting indication event package for the SIP.

The second one is used to specify in which language it is written alternate texts in multiple languages may be carried in the protocol, and selected automatically by the user agent according to user preferences.

A SIP event package for registrations.

RFC – A Session Description Protocol (SDP) Offer/Answer Mechanism to Enable File Transfer

New attributes are added to the standard occasionally through registration with IANA. For example, if a daylight adjustment will subtract 1 hour on 31 October at 03am UTC i. If the stop time is 0 then the session is “unbounded. SIP extension for instant messaging. If the weekly 1-hour session was repeated every Sunday for full one year, i. Common gateway interface for SIP.

By using this site, you agree to the Terms of Use and Privacy Policy. SIP Extension for event state publication. SIP Extension Header field for service route discovery during registration. Setting up SIP application composition. Private SIP proxy-to-proxy extensions for supporting the PacketCable distributed call signaling architecture.

In both cases, each textual field in the protocol which are not interpreted symbolically by iehf 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.

All these offsets are relative to the rfcc time, they are not cumulative. SIP basic call flow examples.

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