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Iphone as external extention with no sound

Discussion in 'iOS' started by ndalikan, Jun 2, 2011.

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  1. ndalikan

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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
     
  2. StefanW

    StefanW Head of Customer Support and Training
    Staff Member 3CX Support

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    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.
     
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  3. StefanW

    StefanW Head of Customer Support and Training
    Staff Member 3CX Support

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    http://www.3cx.com/forums/every-new-post-must-contain-18726.html
     
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  4. willow

    willow Member

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    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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