FAX Default Caller ID

Discussion in '3CX Phone System - General' started by Flash99, Dec 4, 2017.

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  1. Flash99

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    I'm using 15.5
    I have two FAX Extensions and I set Default Caller ID on both of them
    However when we send FAXes from any one of them it shows our main number and not the CID I set for these extensions.

    When I create a regular extension and set CID there it shows correctly

    Any idea whats wrong ?

    Thanks
     
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  2. sip.bg

    sip.bg Active Member

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    May be not working as expected, I can also confirm that main number of the trunk is used.
     
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  3. eddv123

    eddv123 Active Member

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    Providing the SIP provider accepts this as valid you should only need to set the Outbound CallerID on each Extension.

    Here is more detailed guidance including more advanced options.
    https://www.3cx.com/docs/multiple-outbound-caller-ids/

    What gateway or ATA are you using for your FAX machine, what is the make and model ?
     
  4. sip.bg

    sip.bg Active Member

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    I'm using outbound caller-id, taken from extension settings, this works OK for regular extensions, but not for fax extensions for some reason, despite of specific caller-id set for fax extension.
     
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  5. Flash99

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    Same here
    Setting it on regular extension works fine. So there is no problem with SIP provider
    Setting it on FAX extension doesn't work
     
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  6. eddv123

    eddv123 Active Member

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    Interesting ....

    Which make and models of gateways are being used here ? This seems to be working fine for me via a Patton SN4112 Gateway, however please specify which Caller ID you are referring to the actual Caller ID or the number displayed at the top of the fax ?

    As a general rule I would not recommend FAX with 3CX using single port ATA's.
     
  7. Flash99

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    I don't think it has anything to do with the ATA or to the fact its FAX
    Just like in regular extension I can use soft phone or any other supported phone and if I set CID on 3CX it will work (3CX sets the CID and not the phone)
    Same is here with FAX extension, even if I connect a regular phone to it and just make a call it still shows main trunk number and not the CID that was set on 3CX.

    As far as I understand its 3CX bug and would be interesting to hear what 3CX has to say about it
     
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  8. sip.bg

    sip.bg Active Member

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    This has nothing to do with fax header, etc.
    The question is about caller-ID transmitted over SIP protocol.
     
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  9. leejor

    leejor Well-Known Member

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    Does that ATA you are using for the fax machine, have a field to fill in the number to be displayed? Perhaps that may work.
     
  10. sip.bg

    sip.bg Active Member

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    Even it has, it is ignored by PBX, as with ATAs used for regular extensions for example, as well as IP phones -- the extension settings in PBX override endpoint device settings. Outbound Caller-ID is something to be controlled by PBX, at least in 3CX implementation.
     
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  11. YiannisH_3CX

    YiannisH_3CX Support Team
    Staff Member 3CX Support

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    Hello there

    Please note that this is a known issue that is currently being investigated by our R&D department. However we can only replicate the issue when using Originator caller ID. When using outbound caller ID fax extension CID is being sent correctly.
     
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  12. Flash99

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    Thanks. I can confirm that changing to outbound caller ID works.
     
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