All,
Just looking for a clarification which seems to be escaping me. I apologise if it's a trivial question. I have a scenario where a UAS receives an INVITE which has multiple media lines (m=). I realise that if the UAS maybe does not wish/or support one of the media lines then it can simply set the port to 0 and respond in the positive. My question is: What SIP error response code could the UAS use in this situation if the call can not proceed? I am currently working on a draft in the MediaCtrl work group where it would be useful to signal to the UAC that the lack of support for a media line was the reason for failure. I found the following from Paul K: If you are unwilling to do the audio without the video, and are also unwilling to accept a session with no media at all, then the error you want to use is probably 488. The 415 error means you don't understand the media type of a required mime body part in the message. Sorry if I am missing something. Just wondering if there is something missing here. I suppose the 488 could contain a message body as per RFC 3261. I'm not sure a 'Warning' header does the trick. Thanks. Chris. Information contained in this e-mail and any attachments are intended for the use of the addressee only, and may contain confidential information of Ubiquity Software Corporation. All unauthorized use, disclosure or distribution is strictly prohibited. If you are not the addressee, please notify the sender immediately and destroy all copies of this email. Ubiquity Software Corporation plc, a company registered under the laws of England and Wales, Registration 2719723, registered offices at Eastern Business Park, Building 3, Wern Fawr Lane, St. Mellons, Cardiff CF3 5EA, Wales, United Kingdom.
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