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Establishing QoS and Security Preconditions for SDP Sessions

Document Type Expired Internet-Draft (mmusic WG)
Expired & archived
Authors Jonathan Rosenberg , Henning Schulzrinne , Steve Donovan
Last updated 1999-06-21
RFC stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Additional resources Mailing list discussion
Stream WG state WG Document
Document shepherd (None)
IESG IESG state Expired
Consensus boilerplate Unknown
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


This document discusses how network QoS and security establishment can be made a precondition to participation in sessions described by SDP. These preconditions require that the participant reserve network resources (or create a secure media channel) before continuing with the session. In the case of SIP, this effectively means that the 'phone won't ring' until the preconditions are met. These preconditions are described by new SDP parameters, defined in this document. The preconditions can be defined independently for each media stream.


Jonathan Rosenberg
Henning Schulzrinne
Steve Donovan

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)