Internet Drafts and RFCs: Call Signaling

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     Compression   rfc3261   rfc3264   rfc3263   rfc2327   rfc3262   rfc3266   draft-ietf-sip-sipfrag   rfc3326   draft-ietf-sipping-connect-reuse-reqs   draft-ietf-mmusic-fid   draft-kutscher-mmusic-sdpng-req   draft-ietf-sip-update   rfc2976   draft-ietf-sip-session-timer   draft-ietf-sip-183-00   draft-rosenberg-sip-reconstitute   draft-ietf-sip-sctp   draft-oran-sip-visited-00   draft-willis-sip-cookies   draft-pis-00

rfc3261.txt Summary
SIP: Session Initiation Protocol
Author(s) J. Rosenberg, H. Schulzrinne, G. Camarillo, A. Johnston, J. Peterson, R. Sparks, M. Handley, E. Schooler
Organization ietf
State proposed standard
Size 647976 bytes
obsoletes rfc2543.txt Summary
updated by rfc3265.txt Summary
rfc3853.txt Summary
Abstract This document describes Session Initiation Protocol (SIP), an application-layer control (signaling) protocol for creating, modifying, and terminating sessions with one or more participants. These sessions include Internet telephone calls, multimedia distribution, and multimedia conferences. SIP invitations used to create sessions carry session descriptions that allow participants to agree on a set of compatible media types. SIP makes use of elements called proxy servers to help route requests to the user's current location, authenticate and authorize users for services, implement provider call-routing policies, and provide features to users. SIP also provides a registration function that allows users to upload their current locations for use by proxy servers. SIP runs on top of several different transport protocols.
List of diffs from previous RFC. .
rfc3264.txt Summary
An Offer/Answer Model with Session Description Protocol (SDP)
Author(s) J. Rosenberg, H. Schulzrinne
Organization ietf
State proposed standard
Size 60854 bytes
obsoletes rfc2543.txt Summary
Abstract This document defines a mechanism by which two entities can make use of the Session Description Protocol (SDP) to arrive at a common view of a multimedia session between them. In the model, one participant offers the other a description of the desired session from their perspective, and the other participant answers with the desired session from their perspective. This offer/answer model is most useful in unicast sessions where information from both participants is needed for the complete view of the session. The offer/answer model is used by protocols like the Session Initiation Protocol (SIP).

rfc3263.txt Summary
Session Initiation Protocol (SIP): Locating SIP Servers
Author(s) J. Rosenberg, H. Schulzrinne
Organization ietf
State proposed standard
Size 42310 bytes
obsoletes rfc2543.txt Summary
Abstract The Session Initiation Protocol (SIP) uses DNS procedures to allow a client to resolve a SIP Uniform Resource Identifier (URI) into the IP address, port, and transport protocol of the next hop to contact. It also uses DNS to allow a server to send a response to a backup client if the primary client has failed. This document describes those DNS procedures in detail.

rfc2327.txt Summary
SDP: Session Description Protocol
Author(s) M. Handley, V. Jacobson
Organization ietf
State proposed standard
Size 87096 bytes
updated by rfc3266.txt Summary
Abstract This document defines the Session Description Protocol, SDP. SDP is intended for describing multimedia sessions for the purposes of session announcement, session invitation, and other forms of multimedia session initiation. This document is a product of the Multiparty Multimedia Session Control (MMUSIC) working group of the Internet Engineering Task Force. Comments are solicited and should be addressed to the working group's mailing list at confctrl@isi.edu and/or the authors.

rfc3262.txt Summary
Reliability of Provisional Responses in Session Initiation Protocol (SIP)
Author(s) J. Rosenberg, H. Schulzrinne
Organization ietf
State proposed standard
Size 29643 bytes
obsoletes rfc2543.txt Summary
Abstract This document specifies an extension to the Session Initiation Protocol (SIP) providing reliable provisional response messages. This extension uses the option tag 100rel and defines the Provisional Response ACKnowledgement (PRACK) method.

rfc3266.txt Summary
Support for IPv6 in Session Description Protocol (SDP)
Author(s) S. Olson, G. Camarillo, A. B. Roach
Organization ietf
State proposed standard
Size 8693 bytes
updates rfc2327.txt Summary
Abstract This document describes the use of Internet Protocol Version 6 (IPv6) addresses in conjunction with the Session Description Protocol (SDP). Specifically, this document clarifies existing text in SDP with regards to the syntax of IPv6 addresses.

draft-ietf-sip-sipfrag-00.txt Summary
Internet Media Type message/sipfrag
Author(s) R. Sparks
Organization ietf
Working group sip
State unknown
Date 2002-09-13
Size 15121 bytes
Abstract This document registers the message/sipfrag MIME media type. This type is similar to message/sip , but allows certain subsets of well formed SIP messages to be represented instead of requiring a complete SIP message. In addition to end-to-end security uses, message/ sipfrag is used with the REFER method to convey information about the status of a referenced request.

rfc3326.txt Summary
The Reason Header Field for the Session Initiation Protocol (SIP)
Author(s) H. Schulzrinne, D. Oran, G. Camarillo
Organization ietf
State proposed standard
Size 15695 bytes
Abstract For creating services, it is often useful to know why a Session Initiation Protocol (SIP) request was issued. This document defines a header field, Reason, that provides this information. The Reason header field is also intended to be used to encapsulate a final status code in a provisional response. This functionality is needed to resolve the "Heterogeneous Error Response Forking Problem", or HERFP.

draft-ietf-sipping-connect-reuse-reqs-00.txt Summary
Requirements for Connection Reuse in the Session Initiation Protocol (SIP)
Author(s) Rohan Mahy
Organization ietf
Working group sipping
State unknown
Date 2002-10-28
Size 21730 bytes
Abstract When SIP entities use a connection oriented protocol to send a request, they typically originate their connections from an ephemeral port. The SIP protocol includes mechanisms which insure that responses to a request, and new requests sent in the original direction reuse an existing connection. However, new requests sent in the opposite direction are unlikely to reuse the existing connection. This frequently causes a pair of SIP entities to use one connection for requests sent in each direction, and can result in potential scaling and performance problems. This document presents requirements for addressing this shortcoming, and separately proposes an example mechanism which addresses this deficiency.

draft-ietf-mmusic-fid-06.txt Summary
Grouping of m lines in SDP
Author(s) H. Schulzrinne, Goran Eriksson, Gonzalo Camarillo, Jan Holler
Organization ietf
Working group mmusic
State unknown
Date 2002-02-28
Size 38831 bytes
Abstract This document defines two SDP attributes: "group" and "mid". They allow to group together several "m" lines for two different purposes: for lip synchronization and for receiving media from a single flow (several media streams), encoded in different formats during a particular session, in different ports and host interfaces.

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draft-kutscher-mmusic-sdpng-req-02.txt Summary

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Note that this document is expired.
draft-ietf-sip-update-02.txt Summary
The Session Initiation Protocol UPDATE Method
Author(s) J. Rosenberg
Organization ietf
Working group sip
State unknown
Date 2002-05-01
Size 26903 bytes
Abstract This specification defines the new UPDATE method for the Session Initiation Protocol (SIP). UPDATE allows a client to update parameters of a session (such as the set of media streams and their codecs) but has no impact on the state of a dialog. In that sense, it is like a re-INVITE, but can be sent before the initial INVITE has completed. This makes it very useful for updating session parameters within early dialogs. Table of Contents 1 Introduction ........................................ 3 2 Terminology ......................................... 3 3 Overview of Operation ............................... 3 4 Determining Support for this Extension .............. 4 5 UPDATE Handling ..................................... 4 5.1 Sending an UPDATE ................................... 4 5.2 Receiving an UPDATE ................................. 6 5.3 Processing the UPDATE Response ...................... 6 6 Proxy Behavior ...................................... 7 7 Definition of the UPDATE method ..................... 7 8 Example Call Flow ................................... 7 9 Security Considerations ............................. 11 10 IANA Considerations ................................. 11 11 Acknowledgements .................................... 11 12 Author's Addresses .................................. 11 13 Normative References ................................ 11 14 Informative References .............................. 12

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rfc2976.txt Summary
The SIP INFO Method
Author(s) S. Donovan
Organization ietf
State proposed standard
Size 17736 bytes
Abstract This document proposes an extension to the Session Initiation Protocol (SIP). This extension adds the INFO method to the SIP protocol. The intent of the INFO method is to allow for the carrying of session related control information that is generated during a session. One example of such session control information is ISUP and ISDN signaling messages used to control telephony call services. This and other example uses of the INFO method may be standardized in the future.

draft-ietf-sip-session-timer-10.txt Summary
Session Initiation Protocol Extension for Session Timer
Author(s) Jonathan Rosenberg, Steve Donovan
Organization ietf
Working group sip
State unknown
Date 2002-11-08
Size 61571 bytes
Abstract This document defines an extension to the Session Initiation Protocol (SIP). This extension allows for a periodic refresh of SIP sessions through a re-INVITE or UPDATE request. The refresh allows both user agents and proxies to determine if the SIP session is still active. The extension defines two new header fields, Session-Expires, which conveys the lifetime of the session, and Min-SE, which conveys the minimum allowed value for the session timer. Table of Contents

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draft-ietf-sip-183-00.txt Summary

Note that this document is expired.
draft-rosenberg-sip-reconstitute-01.txt Summary

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draft-ietf-sip-sctp-03.txt Summary
The Stream Control Transmission Protocol as a Transport for for the Session Initiation Protocol
Author(s) Jonathan Rosenberg, Henning Schulzrinne, Gonzalo Camarillo
Organization ietf
Working group sip
State unknown
Date 2002-07-01
Size 17350 bytes
Abstract This document specifies a mechanism for usage of SCTP (the Stream Control Transmission Protocol) as the transport between SIP entities. SCTP is a new protocol which provides several features that may prove beneficial for transport between SIP entities which exchange a large amount of messages, including gateways and proxies. As SIP is transport independent, support of SCTP is a relatively straightforward process, nearly identical to support for TCP.

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draft-oran-sip-visited-00.txt Summary

Note that this document is expired.
draft-willis-sip-cookies-01.txt Summary

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draft-pis-00.txt Summary

Note that this document is expired.


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Last Update: May 14, 2002