Loss of audio during start of call

[Gav]

Suffering issues with loss of audio for a second or two at the start of call.
Sequence of events...
Person makes a call
Other end rings
Receiving end picks up
Both ends get audio very briefly at start of call - perhaps for a second.
Both ends then experience a second or two of no audio.
Call then settles down and audio works fine.

I've tried wireshark in an attempt to diagnose but unfortunately it's not letting me hear the audio stream. Is this due to "PBX delivers audio" option?

Any ideas on this?

 

[IoannisM_3CX]

Hello @Gav

Does this occur on internal calls or using a provider?
Have you ran the firewall checker and made sure that passed with no indications of error?
(If this is not occuring using a provider then it's possible that the problem relies on network related issue)

I've tried wireshark in an attempt to diagnose but unfortunately it's not letting me hear the audio stream

>>What do you exactly mean? What is the exact behavior