Re: [SIP] SIP - H.323 - INVITE

Again, call scenarios with different issues resolving (like this) can
be found in the following document:

http://search.ietf.org/internet-drafts/draft-singh-sip-h323-01.txt

Thanx.

Igor Slepchin wrote:

> > 1) When 323 calls, wait until it opens first media channel.
> > Then issue the
> > INVITE, noting only a media line of that media type but with
> > a phony port.
> > When Sip replies (200 OK presumed), complete the 323 media
> > channel being
> > negotiated, giving it the Sip's media port. Then negotiate the reverse
> > channel with 323, saving its port, which is then transmitted
> > to Sip via an
> > ACK with a message body correcting the 323 media port.
>
> This is illegal in SIP (see section 4.2.1 in 2543bis). You should use
> re-INVITE if you want to modify the session offered in INVITE request.
>
> Thank you,
> Igor Slepchin
>
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--
Vladislav Zubarev        mailto:vladis@vovida.com
Software Engineer
Vovida Networks, Inc.    http://www.vovida.com

Re: [SIP] SIP - H.323 - INVITE - No media line.