We are experiencing crackling on some inbound calls when dialing into our PBX via Twilio SIP trunk. We have two way audio fine, and we do not experience this going outbound. We make very few internal calls, most are in or out via Twilio trunk.
Sometimes there are no quality problems when calling in, other times the external caller can hear it as soon as the PBX receives the call, even when ringing or playing a recording in a IVR. I would describe it as a crackling or popping sound. There is never any garble.
When it happens, it happens as soon as the call comes into the PBX, so I do not believe the endpoints are involved.
Anyone have any thoughts? It seems to me to be either related to Twilio Trunk itself or some sort of packet issues from the trunk to the PBX?
Thanks
Environment:
FreePBX - 16.0.40.7
Current System Version - 12.7.8-2306-1.sng7
Asterisk Version - 19.8.0
V2 Azure VM with 2 vCPUs and 8 GB RAM
Twilio Trunk via PJSIP
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