@techreport{ietf-mmusic-sdp-qos-00, number = {draft-ietf-mmusic-sdp-qos-00}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/draft-ietf-mmusic-sdp-qos/00/}, author = {Jonathan Rosenberg and Henning Schulzrinne and Steve Donovan}, title = {{Establishing QoS and Security Preconditions for SDP Sessions }}, pagetotal = 13, year = 1999, month = jun, day = 21, abstract = {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.}, }