[asterisk-dev] a=sendrecv in 183 Session Progress

[Konstantin M.]

Yes, in this case I can agree with that. However I found the same in
http://tools.ietf.org/id/draft-ietf-sip-183-00.txt (5.7.1.5)


> IMHO it's better to generally use sendrecv in the Early Media state,
> because it allows to transfer for example RFC2833 DTMF samples, which
> can be used for one of the implementations of the overlap dialling
> (not RFC 3578 based).
>
> With regards,
>   Pavel
>
>
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