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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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Reliability of provisional responses in SIP. A message summary and message waiting indication event package for the SIP. A presence event package for the SIP.

SIP industry standards compliance

SIP Extension Header field for service route discovery during registration. An offer and answer model with SDP. 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.

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 is provided, as it is here — subscribe to specified as IPv4 Each tfc may contain multiple timing and media descriptions.

A session is described by a series of fields, one per line.

Session Description Protocol

Attributes can appear within the Session or Media sections and are scoped accordingly as session-level or media-level. Retrieved from ” https: SDP does not deliver any media by itself but is used between endpoints for negotiation of media type, format, and all associated properties.


SDP is used for describing multimedia communication sessions for the purposes of session announcement, session invitation, and parameter negotiation.

SIP extension for instant messaging. Values are typically a UTF-8 encoding. If the weekly 1-hour session was repeated every Sunday for full one year, i. 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.

Browse all SIP topics. This product complies with standards for SIP applications as noted in the following table. This page was last edited on 7 Octoberat An invite-initiated dialog event package for the SIP. A mechanism for content indirection in SIP messages.

If the stop time is 0 then the session is “unbounded. Private SIP extensions for media authorization.

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:. Multiple dialog usages in SIP. Intervals can be represented with Network Time Protocol times or in typed time: The set of properties and parameters are often called a session profile.

Update to the SIP preconditions framework. Compliance with standards for SIP applications. This product complies with SIP standards as noted in the following table. SIP Extension Header field for registering non-adjacent contacts. 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 framework for conferencing with the SIP.


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:.

Information on RFC » RFC Editor

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. 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.

Best current practices for third-party call control 3pcc in the SIP. Transcoding services invocation in the SIP using third-party call control 3pcc.

Its name is “SDP Seminar” and extended session information “A Seminar on the ieetf description protocol” is included along with a link for additional information and an email address to contact the responsible party, Jane Doe. Common gateway interface for SIP. A SIP event package for registrations.

Private Extensions to the SIP for asserted identity within trusted networks. Private SIP proxy-to-proxy extensions for supporting the PacketCable distributed call signaling architecture.

Names are only unique within the associated syntactic construct, i. Setting up SIP application composition. All these offsets are relative to the start time, they are not cumulative.