[SIPForum-discussion] 180 ringing there is no SDP . so how we are able to listen the ring tone.(ringing).

[Naveen Gujje]

does a call fail if 180 packet is dropped in the router? Are 100 & 180
essential in the 3-way handshake of Invite - 200oK - Ack

On 4/25/07, Saumil Jhaveri <saumil.jhaveri at yahoo.com> wrote:
>
> if 180 ringing message arrives to the GWC, then GWC can insert a MAS to
> play the audible ringback.
>
> *Shiying Li <jackstraw.lee at gmail.com>* wrote:
>
> Ringing is the default action as soon as it receive a 180 message for the
> INVITE which is sent by itself.
>
>
> On 21 Apr 2007 04:22:04 -0000, mwilliam prusty <
> callwilliam90653 at rediffmail.com> wrote:
> >
> >
> > in the 180 ringing there is no SDP i.e no media information. . so how we
> > are able to listen the ring tone.(ringing).
> >
> >
> >
> > plz answer
> >
> >
> >   [image: 2007-1-R-N-0083]<http://adworks.rediff.com/cgi-bin/AdWorks/click.cgi/www.rediff.com/signature-home.htm/1050715198@Middle5/1166323_1160412/1165498/1?PARTNER=3&OAS_QUERY=null+target=new+>
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>
> ------------------------------
> Ahhh...imagining that irresistible "new car" smell?
> Check out new cars at Yahoo! Autos.<http://us.rd.yahoo.com/evt=48245/*http://autos.yahoo.com/new_cars.html;_ylc=X3oDMTE1YW1jcXJ2BF9TAzk3MTA3MDc2BHNlYwNtYWlsdGFncwRzbGsDbmV3LWNhcnM->
>
>
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