[asterisk-users] RTP over TCP

[Michael Graves]

On Fri, 23 Apr 2010 23:11:06 +0200, adamk at 3a.hu wrote:

>Hi Guys,
>
>On 04-23-2010 21:40, Nathan Clemons wrote:
>> SIP is just the control protocol, and can be negotiated over TCP or UDP. The
>> actual payload is done over RTP, which is a UDP-based protocol.
>>
>
>thanks, for both of you for pointing this out.  i was obviously on the 
>wrong track here.  since i see the rtp traffic via tcpdump, i'm going to 
>ask the other gw's sysadmin to see into this, maybe there is some 
>logging on the other side.
>
>> If you had to add firewall exceptions/PAT config for the TCP SIP traffic,
>> you'll also need to add the same for RTP traffic as well.
>>
>
>this is a private pilot network for testing purposes, no internet 
>connection, no nat, no firewall.  it's like the 90s :)

Actually, it is more common for RTP to be over UDP, but RTP over TCP is
possible. In fact, this is the default RTP mode for M$ Office
Communications Server. 

I beleive that it may be possible to use RTP over TCP in Asterisk as
there was someone work on this inorder to have interop with M$.

Michael
--
Michael Graves
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