[asterisk-users] RTP over TCP

[Hans Witvliet]

On Sat, 2010-04-24 at 10:56 -0500, Michael Graves wrote:
> 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$.
> 

No, that was just sip over tcp (instead of udp)
I friend of mine had an * talking to M$, so that was one of the reasons
for early deployment of an 1.6.x asterisk...