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Iphone as external extention with no sound

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ndalikan

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Jun 2, 2011
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Hello,

I have configured an iphone to connect to the PBX.

When with in my WLAN, everything works fine. But when I am outside, either on another wlan or on 3G, I can connect but I have no sound.

Any ideas what can be wrong?

Thank you,
NDA
 
This sounds like network issues. Does the party outside hears u but you dont hear?
Then the issue is
1 Wifi) you have no NAT in the Firewall to Frwd SIP and RTP to the IP of the iPhone

2 3G) Ur Provider blocks VoIP Calls.
 
http://www.3cx.com/forums/every-new-post-must-contain-18726.html
 
I would recommend forwarding port 9000-9049 to the 3cx. Also check and make sure that your router does not have a sip alg running. I have seen netgear routers with sip alg do weird things to the sip rtp.
 
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