[OpenSIPS-Users] When do I need MediaProxy?

[Saúl Ibarra Corretgé]

Hi,

On 3/4/10 9:31 PM, James Lamanna wrote:
> Hi,
> I'm trying to use OpenSips as a registration server for Asterisk
> (assuming we can get presence working ok).
> Do I need to setup and use MediaProxy (or similar)? Or is the
> nathelper stuff good enough?
> I've made test calls from phones behind NAT to opensips to asterisk
> and I haven't experienced any
> one-way audio problems.
> Also, the phones are not allowed to reinvite, because I need to keep
> Asterisk in the media path.

If you want Asterisk to stay in the media path then you don't need 
MediaProxy. By setting nat=yes for a SIP peer Asterisk uses the so 
called COMEDIA mode, that is, it waits to receive RTP and sends RTP to 
where it received it from, not trusting the SDP.


Regards,

-- 
Saúl Ibarra Corretgé
AG Projects