unsupported sip trunk

  1. 3CX Trunks

    Are there some trunks that just will not work with 3CX. I work for a small ISP. We have several FreePBX servers working with our SIP services. We are in the process of looking for another solution for our PBX deployments. I have gone through setting up the unsupported trunk set up in 3CX...
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