503 service unavailable

  1. License Full Call Handling

    I’m running a self hosted 3CX v20 instance with a Twilio SIP trunk for my HVAC business, and I’ve run into a behavior that I believe is a meaningful gap in 3CX’s call handling. The issue When the concurrent call license limit is reached, 3CX answers the incoming call and plays a recording...
    • ASofNWAugusta
    • Thread
    • 486 busy here 503 service unavailable call handling license limit
    • Replies: 0
    • Forum: 4SC

  2. v20 Weird issue with mobile app (PBX delivers audio is workaround)

    Hello, we upgraded to v20 and have a strange issue lately. I'm not sure if it started with the latest update to Update 2 (Build 715) or if it was there on the initial v20 build. Outgoing calls to any external number via our SIP trunk originating from the 3cx mobile app (both Apple and Android...

  3. 503 Service Unavailable / reason Server Failure

    I really need some help guys! I am using dial 9 to make an outbound call but the the 3cx operator just keep saying please contact administrator and finding what cause it to be fix but I'm having a hard time to know what had it cause. ----------------------------------------- windows server 2008...
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