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PSA: Inbound calls busy / log shows unanswered / restart SIP services to resolve

Discussion in '3CX Phone System - General' started by us1, Jan 5, 2018.

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  1. us1


    Oct 19, 2015
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    I've had a few incidents of this across several systems. There was another forum posting about this a few months ago:


    The systems in question are Linux installs (mixture of 15.5 SP1 and SP2 releases). All are hosted with the same provider. All phones are STUN. I start receiving alerts of calls to the system failing due to Channel Unavailable. When calling the number, it rings as a normal "busy" or with a message stating "Your call could not be completed as dialed." Reboots of the server sometimes resolve it. I've attempted re-registration of the SIP trunk (Vitelity) but still the same issue. I finally was able to resolve it by restarting the SIP services from the services page.

    I'm posting this here for the following:
    1) Informational -- Hoping others will find this post helpful in the event of a similar issue.
    2) Documentational -- I could not post to the thread linked above as it was closed for additional comments.
    3) Inquiry -- It would be good to know if others have experienced similar to this and, if so, it would be a helpful datapoint for 3cx to research the cause of this issue and rectify it in a future update.

  2. apostolis_3CX

    apostolis_3CX Support Team
    Staff Member 3CX Support

    Nov 1, 2017
    Likes Received:
    Hi us1,
    Thank you for sharing your solution.
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