[Kamailio-Users] early media and first SIP/Kamailio Configuration

Stefan Sayer stefan.sayer at iptego.de
Thu May 14 16:23:40 CEST 2009



o Daniel-Constantin Mierla [05/14/09 14:43]:
> Hello,
> 
> On 05/14/2009 12:06 PM, Stefan Sayer wrote:
>> Hello,
>> o bahanfar at hotmail.de [05/13/09 11:23]:
>>  
>>> Hi,
>>>
>>> I am newcomer in SIP and Kamailio Wold an have a question.
>>>
>>> I have two IP Telefones and would like to realize with Kamailio an IP 
>>> Communication. The Problem:
>>>
>>> a. The UA 1 calls UA 2
>>> b. UA 2 start recording the video form UA 1, before a SIP call is 
>>> established (early media)
>>>     
>> early media is the other way round, from UA 2 to UA 1. UA 1 starts 
>> sending media (audio, video, whatever) when it receives 200 OK with 
>> SDP answer from UA1 - before it could not possibly know where to send 
>> media to, what
>> codec etc.
>>   
> 
> 183 reply usually has the sdp of callee, therefore the caller can send 
> rtp. Or am I missing something?
can, but does usually not do.

It also does not make sense to not setup the session, if you do want to 
have the session.

Stefan





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