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Cannot make outgoing call to extension.

Discussion in '3CX Phone System - General' started by Den1s, Feb 9, 2017.

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  1. Den1s

    Jan 19, 2017
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    I have set up my 3CX phone system in two locations. The first is HOME and the other is OFFICE. The HOME system runs off my main server and the OFFICE location runs off an SBC.

    I can receive an extension call from the HOME location but I cannot make a call to an extension to my HOME location. When I attempt this I get two beeps and a signal to hang up.

    The log is below.

    02/09/2017 1:39:26 PM - [CM302001]: Authorization system can not identify source of: UnkSrc Recv Req SUBSCRIBE from tid=17820186611277931944 Call-ID=293962211120045-254812221562@
    SUBSCRIBE sip:002@;transport=UDP SIP/2.0
    Via: SIP/2.0/UDP;branch=z9hG4bK-524287-2---17820186611277931944;rport=5080
    Via: SIP/2.0/UDP PublicIP55874;branch=z9hG4bK-524287-1---tunneltid;rport;tnlid=sbc.c3db5ed6
    Via: SIP/2.0/UDP;branch=z9hG4bK17820186611277931944
    Max-Forwards: 68
    Record-Route: <sip:3cxBridge@;user=proxy;uri=sbc.c3db5ed6>
    Record-Route: <sip:3CXSBC@;user=proxy;tnlid=sbc.c3db5ed6>
    Contact: <sip:008@>
    To: "002"<sip:002@>
    From: "Remote Phone"<sip:008@>;tag=1005821542
    Call-ID: 293962211120045-254812221562@
    Expires: 900
    Accept: application/dialog-info+xml, application/rlmi+xml, multipart/related
    Supported: eventlist
    User-Agent: Fanvil X5
    Event: dialog
    Content-Length: 0

    Is there anything above that show the reason for the problem?

    I do not recognise the IP address in this line...

    Record-Route: <sip:3CXSBC@PublicIP:5060;user=proxy;tnlid=sbc.c3db5ed6>

    Please help.


  2. GiannosC_3CX

    GiannosC_3CX Guest

    Hi Den1s,

    As I can see you are using a higher firmware, so please downgrade your Fanvil firmware to
    Please download from the management console Updates=> Phone firmware => select and download it.
    You can find it on this location C:\ProgramData\3CX\Instance1\Data\Http\Interface\provisioning\%RandomFolder%\firmware_new\fanvil on your server and follow this link to downgrade manually https://www.3cx.com/sip-phones/firmware-update-fanvil/ is the same steps as the upgrade, but It is better to contact your manufacturer for further help about downgrade/upgrade.

    Also please let us know what version and OS of SBC and 3CX Phone system are you on?
    Did you follow the steps on this link https://www.3cx.com/docs/3cx-sbc-windows/ to install the SBC?
  3. Den1s

    Jan 19, 2017
    Likes Received:
    Thank you for your prompt response.

    I did follow the guide you mention. I am on v15 of 3CX and the latest version of SBC which was download yesterday.
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