[asterisk-users] Asterisk 11- Answer with [m=image 0 udptl t38] and Call Drop

[Andreas Sikkema]

On 1/18/13 13:24 , Matthew Jordan wrote:
> 1) Contact your carrier and ask why they are rejecting the 200 OK.
> 
> 2) Assuming they won't change their behaviour, find out what they want
> in a response that declines an image media format. Without knowing what
> your carrier thinks the SDP should look like, any modifications you make
> to Asterisk will be guesses.


I ran into a similar problem this week. There's a number of SIP
implementations (either legacy or not good enough) that don't handle a
zero port denial of a media stream quite right.

In the past these implementations would have worked fine when the called
party would have just ignored the offending media stream, instead of
sending an explicit deny.

-- 
Andreas Sikkema