Subject: H.248 Data stream specification

From: Gunnar Hellstrom <[email-masked]>
Date: Tue, 7 Sep 1999 22:46:34 +0200

In H.248, RTP transport of data streams seem to be preferred, especially on
the IP side.

In reality, many data streams use TCP.

 - Fax has both options UDP and TCP.

 - Text conversation in H.323 Annex G, may use RTP, but TCP is preferred.

 - T.120 is normally carried by TCP.

But: The SDP syntax requires MIME registered streams. SDP so far assumes RTP
data streams.

I would like to know if this is on intention, or if it is just as it
happened to be, before any detailed data stream descriptions was entered?

Do we have to register T.123 and TCP as valid transports with IANA if we
want to use them in a package?
Is that process on the way?

Regards
______________________________________
Gunnar Hellström
LM Ericsson
Sweden

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