RFC 2833 states that telephone-event RTP packets can be sent instead-of *OR* in-addition-to voice.
Is it correct that negotiating telephone-event as one format in a media stream
m=audio 8000 RTP/AVP 0 97 a=rtpmap:0 PCMU/8000 a=rtpmap:97 telephone-event/8000
implies the former ("instead-of"), while multiple media streamsm=audio 8000 RTP/AVP 0 a=rtpmap:0 PCMU/8000 m=audio 8002 RTP/AVP 97 a=rtpmap:97 telephone-event/8000
implies the latter ("in-addition-to") ??
Which technique is usually used?
In the latter case, would you expect the 8002 stream to send anything when no telephone-events were happening (normal voice)?
Thanks, -troy
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