Solved 3CX does not respond to SIP Invites after last Update

Discussion in '3CX Phone System - General' started by Lev, Nov 17, 2017.

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  1. Lev

    Lev New Member

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    SOLVED:

    Last night i updated to the latest Version.
    But now, when i call out, there is NO Audio.
    All incomming calls are redirected to my Trunk-Backup Number.

    After asking my Trunk Provider, they told me, that SIP Invites are not answered by the 3CX (hosted, Debian)

    Any Ideas?

    Edit:
    Thanks to the great support on the Forums, we found out, that it was an DNS Problem.
    Some sort of IPv4 vs IPv6 thing...

    SOLUTION:
    In the Trunk settings the outbound Proxy must be set to an IP, not a FQDN.
     
    #1 Lev, Nov 17, 2017
    Last edited: Nov 17, 2017
  2. YiannisH_3CX

    YiannisH_3CX Support Team
    Staff Member 3CX Support

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    Hello @Lev

    Check your ip blacklist, is your providers ip blacklisted for some reason? Also can you pass the firewall check of the PBX? Do you see any issues there?
     
  3. Lev

    Lev New Member

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    - Blacklist is empty
    - Firewall check:

    Code:
    [*]resolving 'stun-eu.3cx.com'... done
    [*]resolving 'stun2.3cx.com'... done
    [*]resolving 'stun3.3cx.com'... done
    [*]resolving 'sip-alg-detector.3cx.com'... done
    [*]testing 3CX SIP Server... done
    [*]stopping service... done
    [*]detecting SIP ALG... not detected
    [*]testing port 5060... done
    [*]starting service... done
    [*]testing 3CX Tunneling Proxy... done
    [*]stopping service... done
    [*]testing port 5090... done
    [*]starting service... done
    [*]testing 3CX Media Server... done
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  4. YiannisH_3CX

    YiannisH_3CX Support Team
    Staff Member 3CX Support

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    Is your provider register based or IP based? Also is your provider a supported one?
     
  5. Lev

    Lev New Member

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    - Provider is supported - Deutsche Telefon Standard AG
    - Register based

    The Registration looks good
     
  6. YiannisH_3CX

    YiannisH_3CX Support Team
    Staff Member 3CX Support

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    We have a Deutsche Telefon test account registered on SP2 and everything looks good. Inbound and outbound calls work great.
    can you run a wireshark capture from the management console and send it to me in a p.m so i can take a look? Try an inbound and an outbound call if you can
     
  7. Lev

    Lev New Member

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    Sorry, but where can i add an attachment?
     
  8. YiannisH_3CX

    YiannisH_3CX Support Team
    Staff Member 3CX Support

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    You have to upload it to a web sharing service like Dropbox or WeTransfer and send me the download link
     
  9. Lev

    Lev New Member

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    ok, i uploaded it to an ftp
     
  10. Lev

    Lev New Member

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    The Issue was addressed by a nice support worker via TeamViewer.
    Thanks a log again.

    I stated the solution in my first posting.
     
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