Inbound T.38 Faxing with IPCOMMS.NET and 3CX

Discussion in '3CX Phone System - General' started by fff, Nov 6, 2012.

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  1. fff

    fff

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    I'm wondering if anyone has been able to get inbound faxing to work with an IPComms.net account?
    I've played arround with all the settings and configurations and still no luck.

    When I set the DID to go to the 888 fax server IPComms will send an INVITE, 3cx sends back a 100 Trying and nothing else. Eventually IPComms sends a CANCEL when it gives up. Nothing else.

    I've turned off all software firewalls on the server.
    I opened up all ports on the WATCHGUARD that sits in between.
    I tried all settings in the faxglb.cfg and in_session.cfg files.
    I tried STUN on and off.
    I talked with the IPComms people (who have been very helpful) and they show the same trace I do. \

    Why isn't 3CX responding with a ringing or answer or something?
     
  2. mixig

    mixig Active Member

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    Try this:
    select DID to send fay to email extension and see did you get fax in inbox
     
  3. fff

    fff

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    I did that already. I have tried setting the whole voip provider to the 888 extention and I have also created a DID for it and pointed it at 888. Neither work. If I point at a voice extension it does work (but with voice not fax) so it must be the built-in fax software that is failing.
    Another thing IPCOMM pointed out was that when I send faxes outbound I have my private IP address in the C and O records. They said it should be my public IP. Reading others post it seems the cfg files are supposed to fix this but they oviously aren't.
     
  4. mixig

    mixig Active Member

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    When you try to call your fax DID on 3cx from normal phone can you hear fax sound?
     
  5. fff

    fff

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    No. I hear nothing until it dumps out.

    --> Invite
    <--100 Trying
    {a long pause}
    -->Cancel
    <--200 OK
     
  6. mixig

    mixig Active Member

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    Is your fax extension registered (default extension number is 888)? You can check that in System Extension Status in management console
     
  7. fff

    fff

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    Yes it is.
     
  8. mixig

    mixig Active Member

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    Which version of 3cx do you have? In v10 you must choose the network interface for fax serve or you will not get fax response, in v 11 i see that they remove interface card to select as an option (even in manual there is still that option)
     
  9. fff

    fff

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    I have v11 but maybe that is the problem. I do have two nics in the server and only one has the gateway setup.
     
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