[Asterisk-Users] SIP Phone -> Asterisk -> SIP LD Provider question

[Anton Tinchev]

Peter Pauly wrote:
> If Asterisk registers with a SIP long distance provider and
> I make a call from an IP phone through Asterisk to that
> LD provider, does the RTP (audio) traffic flow between the two
> end points directly (normally the IP phone and the LD provider) or
> does it flow through Asterisk?
> 
> I'm asking because I have Asterisk running behind a NAT firewall
> along with an IP Phone (software) and I'm trying to get it
> working with Iconnecthere (ICH). I am able to register, connect
> , but no audio. I have ports opened up on the firewall, but
> they point to the Asterisk machine and not the IP phone machine. 
> In this scenario, any audio traffic would have to go through the
> asterisk box to reach the IP phone. Is that how it works?
SIP control connection usualy goes thru firewall. RTP - no.
Just put the Asterisk on the machine with the firewall and it will work.