Whilst the document contains some useful examples of how services might be implemented it does not I believe represent the BCP for some services and publishing this as BCP may not help interoperability. For example the document describes the service "Call Hold" and indicates that "a=sendonly" should be used but also states that "a UA that places the other party on hold will generally also stop sending media, resulting in no media exchange between the Uas". The use of "a=sendonly" in the case where no media is to be sent is clearly not best practice as in this case "a=inactive" should be used. The draft-ietf-sipping-sip-offeranswer contains a much better description of how media should be held and resumed. Regards Andy However, Older UAs may set the connection address to 0.0.0.0 when initiating hold. However, this behavior has been deprecated in favor of using the a=sendonly SDP attribute. > -----Original Message----- > From: The IESG [mailto:iesg-secretary@xxxxxxxx] > Sent: 08 November 2007 13:42 > To: IETF-Announce > Cc: sipping@xxxxxxxx > Subject: [Sipping] Last Call: > draft-ietf-sipping-service-examples (Session Initiation > Protocol Service Examples) to BCP > > The IESG has received a request from the Session Initiation Proposal > Investigation WG (sipping) to consider the following document: > > - 'Session Initiation Protocol Service Examples ' > <draft-ietf-sipping-service-examples-13.txt> as a BCP > > The IESG plans to make a decision in the next few weeks, and solicits > final comments on this action. Please send substantive > comments to the > ietf@xxxxxxxx mailing lists by 2007-11-22. Exceptionally, > comments may be sent to iesg@xxxxxxxx instead. In either case, please > retain the beginning of the Subject line to allow automated sorting. > > The file can be obtained via > http://www.ietf.org/internet-drafts/draft-ietf-sipping-service-examples- 13.txt > > > IESG discussion can be tracked via > https://datatracker.ietf.org/public/pidtracker.cgi?command=vie > w_id&dTag=8508&rfc_flag=0 > > > > _______________________________________________ > Sipping mailing list https://www1.ietf.org/mailman/listinfo/sipping > This list is for NEW development of the application of SIP > Use sip-implementors@xxxxxxxxxxxxxxx for questions on current sip > Use sip@xxxxxxxx for new developments of core SIP > _______________________________________________ Sipping mailing list https://www1.ietf.org/mailman/listinfo/sipping This list is for NEW development of the application of SIP Use sip-implementors@xxxxxxxxxxxxxxx for questions on current sip Use sip@xxxxxxxx for new developments of core SIP _______________________________________________ Ietf@xxxxxxxx https://www1.ietf.org/mailman/listinfo/ietf