LONDON UK 15 JANUARY 2015 - 3CX, developer of the award-winning Windows VoIP PBX 3CX Phone System, today announced the launch of 3CX Phone System 12.5. The latest version of 3CX Phone System leverages WebRTC technology to offer click-to-call and video
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eagle2 wrote:If you are familiar with Wireshark try to capture and analyze the traffic - there should be an obvious reason - probably the voice path is problematic between the remote extension and the gateway.
Have you tried 'PBX delivers audio' for remote extensions (I don't remember)?
What is the codec for PSTN lines in the gateway?
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