I would like to share my experience about remote SIP extension with Trixbox. It looks like hundreds people have such problem over and over again, and it is like the worst nightmare when you try to use remote IP phone from your home (for example) and you hear dial tone but no audio ...... Yeap I can feel your pain becasue I have experienced the same feeling. I have spend 3 days dealing with no audio on remote SIP extension. I used Polycom IP 501 but I think it does not matter what phone you use.
I shaked my firewall when Trixbox was installed, and no luck. Then I have tried to kill Polycom phone .... , and finally get to a router that is at my home. SIP was conected with Trixbox (however TRIXBOX 2.6.2.3 showed 1058 SIP port openned, not 5060 like other phones inside the LAN where TRixbox was placed) and of course all the time there was no AUDIO. I could dial from any extension to remote extension and hear audio but not vice versa. I have started to suspect my home router and that was the problem that lately shows up. I simply hooked up PIX router and was able to hear audio when make a call from remote to internall extension. I don't want to blame ISP beasue everyone knows that RTP ports are in charge of audio. Of course I was playing with forwarding ports on previous router but no luck .... I think cheap routers are the best idea when you think about remote SIP extension. More expensive investment would pay with less headache in setting up everythink. Of course someone would ask did you check your Trixbox config files yea yea yea ..... sip_nat and etc ..... That was my experience with remote extension and final conclusion IN MY SITUATION was that I used pretty cheap ($100) router that could not handle RIP udp ports ......
MST
Member Since:
2008-05-02