Hi, >>>Let's say we have something (not DTMF) that needs to transport jpg >>>images that are used as soft-key overlays. To do what you're >>>suggesting, we'd need a new MIME-type registration that says "This is
>>>just like jpeg, except that it is only useful for keypad overlays". >>>The MIME folks would birth kittens. >> >>I think you may have misunderstood my example here. I'm postulating >>that you don't change the MIME type (jpeg) you change the supported/ >>required header value. > > >I think that conflicts with the way Supported and Require >work. They both purely say "Can support these options at any >time", not "I expect you to use this particular option's >handling for this particular message" > >Let's say you support jpeg for image-mapped touch screen and >jpeg for storing in my pone book and displaying with caller >ID. You'd indicate support for both in "Supported" and would >not reject a request with Require for both. > >I send you a jpeg. How do I tell you whether to put it on >your screen as an image map or store it in your phone book? If the application on the receiving side (or the person your're talking to) has asked you to send a jpeg, it most likely knows what to do it. This is similar to when the receiver subscribes to an "jpeg event". The one sending the jpeg may not know what the receiver is going to do with it, but the one subscribing to the event knows. If you send a jpeg just "out of the blue", you may not know what the receiver is going to do with it. The receiving end may prompt the user what to do, it may do something by default, etc. That is an implementation issue - not a SIP protocol issue. SIP is simply used to transport the jpeg. That is the whole purpose of INFO - sending data which is not related to the SIP session itself. Regards, Christer _______________________________________________ Sip mailing list https://www1.ietf.org/mailman/listinfo/sip This list is for NEW development of the core SIP Protocol Use [EMAIL PROTECTED] for questions on current sip Use [EMAIL PROTECTED] for new developments on the application of sip
