No Voice on remote IP Phone

Discussion in '3CX Phone System - General' started by digitel, Mar 21, 2011.

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  1. digitel

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    Hi All
    New to this forum , I've searched along posts with no results....

    I have latest 3cx ver. installed
    All works ok

    I set up an IP Phone ( Grandsteram BudgeTone 100 ) to be used on any remote site capable of an internet connection and a DHCP-Server router.

    At first test, the ip phone registers correctly to 3cx server, it can place and receive calls (telephones ring) but no voice is present at hook-off, both directions

    On 3cx router side, port 5060 is opened, both tcp and udp and forwarded to 3cx LAN IP
    3cx server is reachable by a dyndns domain not a fixed public IP
    When the phone rings and ,at hook-off no voice is present, I see however a continuos traffic on routers wan status led


    Any suggestion or solution about issue ??

    Thank you very much

    Federico
     
  2. sigma1

    sigma1 Active Member

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    Most of the time that is due to a firewall issue if you followed all the setup directions.

    What router do you use at the remote site?
    Please make sure you specify the STUN server as IP:pORT
    Enable Symmetric RTP

    This, provided that you tested with the 3CX softphone at remote site and all is OK.

    At the remote site, please do NOT FWD any ports, simply let the ports be.
     
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  3. digitel

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    Sigma1, thanks for reply

    I don't remember the exact router model, it is a USR wifi adsl one,
    Where sould I specify the STUN server ? On Ip Phone setup ??
    If yes, what stun server shall I choose , as I don't use any provider but only 3cx for communications between its extensions ???

    I will look at Symmetric RTP and double-check with 3cx softphone.

    remote site router hasn't been modified,
    Local 3cx cisco router has port 5060 forwarded to 3cx server

    let me know

    Thank you again

    Federico
     
  4. digitel

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    A further info.....
    This is 3cx call log
    301 is the local (LAN) calling extension
    305 is the remote extension (grandstream ip phone) , registered to 3cx via internet.....


    14:40:53.119 [CM503020]: Normal call termination. Reason: Server Failure
    14:40:53.119 [CM503016]: Call(12): Attempt to reach "GrandStream"<sip:305@192.168.192.3> failed. Reason: Server Failure
    14:40:53.119 [CM503003]: Call(12): Call to sip:305@mydomain.dyndns.org has failed; Cause: 503 Service Unavailable; warning: ; internal
    14:40:53.019 [CM503025]: Call(12): Calling Ext:Ext.305@[Dev:sip:305@0.0.0.0:5060]
    14:40:52.688 [CM503004]: Call(12): Route 1: Ext:Ext.305@[Dev:sip:305@0.0.0.0:5060]
    14:40:52.678 [CM503010]: Making route(s) to "GrandStream"<sip:305@192.168.192.3>
    14:40:52.678 [CM505001]: Ext.301: Device info: Device Identified: [Man: Linksys;Mod: SPA Series;Rev: General] Capabilities:[reinvite, no-replaces, able-no-sdp, recvonly] UserAgent: [Linksys/SPA942-6.1.3(a)] PBX contact: [sip:301@192.168.192.3:5060]
    14:40:52.658 [CM503001]: Call(12): Incoming call from Ext.301 to "GrandStream"<sip:305@192.168.192.3>
    14:36:11.754 [CM503016]: Call(11): Attempt to reach "GrandStream"<sip:305@192.168.192.3> failed. Reason: Server Failure
    14:36:11.704 [CM503025]: Call(11): Calling Ext:Ext.305@[Dev:sip:305@0.0.0.0:5060]
    14:36:11.384 [CM503010]: Making route(s) to "GrandStream"<sip:305@192.168.192.3>
    14:36:11.354 [CM503001]: Call(11): Incoming call from Ext.301 to "GrandStream"<sip:305@192.168.192.3>
    14:29:59.759 [CM506001]: STUN request to resolve SIP external IP:port mapping is sent to STUN server 96.9.132.83:3478 over Transport 192.168.192.3:5060
    14:25:19.266 [CM503016]: Call(10): Attempt to reach "GrandStream"<sip:305@192.168.192.3> failed. Reason: Server Failure
    14:25:19.166 [CM503025]: Call(10): Calling Ext:Ext.305@[Dev:sip:305@0.0.0.0:5060]
    14:25:18.856 [CM503010]: Making route(s) to "GrandStream"<sip:305@192.168.192.3>
     
  5. sigma1

    sigma1 Active Member

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    I have a funny question...

    What is the IP address of your remote router (WAN) and what is the IP address of your remote phone?

    Are you running this over VPN?
     
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