John C Klensin wrote: > is needed to do anything useful. Unlike what Paul seems to > imply by his assertion that the signaling mechanisms are > essentially audio because they are analogous to DTMF tones, I > believe those non-text top-level types are differentiated by the > base capability that is required to _render_ the type, RFC2046: > (3) audio -- audio data. "Audio" requires an audio output > device (such as a speaker or a telephone) to "display" > the contents. An initial subtype "basic" is defined in > this document. As Paul indicated, T.38 is used between gateways. The receiving gateway turns the data into a telephone call. In what way does this not satisfy *exactly* the requirements for the audio top-level MIME type? d/ -- Dave Crocker Brandenburg InternetWorking bbiw.net _______________________________________________ Ietf@xxxxxxxx https://www1.ietf.org/mailman/listinfo/ietf