[Serusers] c= wrong ?

[Zeus Ng]

If you gateway support the a=direction:passive directive, it is not
necessary to proxy the media. I'm not sure how mediaproxy handle this
situation.

Multiple c= lines is allowed and well documented in RFC 2327. The first one
is the connection information for the whole session. It applies to all media
in the session. One can also specify media specific connection.

An example would be setting a session level connection information for voice
and video but a different media level connection information to a power
point presentation running somewhere outside.


> Hi
> 
> The message below is from ser to the UA, now it seems as if the c= is 
> wrong, because the UA is behind a NAT, and the c= should be of my 
> mediaproxy (...correct ?), but it is actually of my pstn GW
> 
> 1.2.3.4 = ser
> x.x.x.x = client
> a.b.c.d = pstn gw
> 
> Also why are there two c= lines
> 
> Iqbal
> 
> 
> U 2005/09/08 15:35:37.529854 1.2.3.4:5060 -> x.x.x.x:5060
> 
> .
> v=0.
> o=CiscoSystemsSIP-GW-UserAgent 3096 5788 IN IP4 a.b.c.d.
> s=SIP Call.
> c=IN IP4 a.b.c.d.
> t=0 0.
> m=audio 19570 RTP/AVP 0.
> c=IN IP4 a.b.c.d.
> a=rtpmap:0 PCMU/8000.
> 
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