[Asterisk-Users] Can't connect KPhone to asterisk

[Maciek Kaminski]

Regovich, Timothy wrote:

>Not ACK'ing an invite can be problematic for the statemachine.  Without the
>ACK, the Dialog is not in  acorrect state.
>
>As for the SDP goes, the KPHONE is offering what it can accept, and asterisk
>is doing the same.  There is no restriction that they must match.  You can
>change your offer in the ACK, or with a re-INVITE.
>  
>
Well, they must intersect:
"For streams marked as sendrecv in the answer, the "m=" line MUST 
contain at least one codec the answerer is willing to both send and 
receive, from amongst those listed in the offer. The stream MAY indicate 
additional media formats, not listed in the corresponding stream in the 
offer, that the answerer is willing to send or receive (of course, it 
will not be able to send them at this time, since it was not listed in 
the offer).

>As for the immediate transmission : yeah, it does seem a little strange
>doesn't it?  But that is the way that I have seen almost all UAs work.  The
>implication is that your offer must be a valid, not a conditional offer :
>when you say you accept GSM on port 8000, you better have a listener on 800
>ready to go. 
>  
>
Optimistic strategy...

Maciek Kaminski