And what is the situation in H.248/Megaco? I did not find any reference to RTCP in this recommendation.

Ernst Horvath Siemens AG

-----Ursprüngliche Nachricht----- Von: Rex Coldren [mailto:coldrenr@agcs.com] Gesendet am: Dienstag, 08. Mai 2001 19:40 An: ITU-SG16@mailbag.cps.INTEL.COM Betreff: RTCP support in H.323 All, I'll be lazy and ask rather than looking through the ASN.1 to find it... Is there support in H.323 for signaling to use RTCP?

There is a current thread on the IETF AVT e-mail reflector where talk is of making RTCP mandatory (i.e.-changing it from a SHOULD to a MUST in the RTP specification). The last I heard was that the MUST would apply to implementing RTCP, and not necessarily to using it. Presumably the application level call signaling protocol can be responsible for signaling whether RTCP was to be used.

If an endpoint implemented RTCP it should at least benignly ignore received RTCP reports and would not need to send any. So a given operator could specify that RTCP not be signaled if it were not practical in their network. Obvious examples would be wireless networks and cable networks where there are access bandwidth constraints.

Cheers, Rex

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