Fanvil X210 intermittent audio

[imaginechurchza]

Good Day 3CX Community,
We have a Fanvil X210 as our switchboard phone, and we are getting some calls that comes through where we cannot hear the person on the other end, but they can hear us. Once they call back again or we call them, then suddenly the audio is 100%.
We have 25 Phones in our office, all connecting through a SBC to our Self hosted 3CX Server.
None of our other office phones have any issues, just our Fanvil X210.
I have taken a look at the log file from the phone itself, but can't make heads or tails about what the issue may be. Perhaps someone could take a look, and help me out? I just need to know what the issue may be, and where to start looking to resolve it.
This is for internal & External calls.

 

[HRMNY]

Have you tried factory resetting the phone? Does this only happen with external calls from the PSTN? Since it's the switchboard, are they the first person/phone to always answer external calls?

 

[imaginechurchza]

Hey @HRMNY
So its only happening on the switchboard phone, and over the past few days, only seems to be internal calls...
I've made sure the PBX delivers Audio is on, and the Support re-invites is on, on the 3cx backend, but still seems to be a common issue.

 

[imaginechurchza]

Is there anything specific I should be looking for in the log files to see what the issue may be? The reception phone is a fanvil x210, but the office phones are Samsung OfficeServ SMT-i3100.

 

[HRMNY]

Is there anything specific I should be looking for in the log files to see what the issue may be? The reception phone is a fanvil x210, but the office phones are Samsung OfficeServ SMT-i3100.

Do you have the Samsung phones configured in 3CX or bridged from a Samsung PBX?

 

[imaginechurchza]

configured in 3CX itself going through the 3SX SBC.

 

[HRMNY]

configured in 3CX itself going through the 3SX SBC.

Those are not suported by 3CX, so you might be running into some compatibility issues. I would bet if you had another Fanvil or supported phone, you're issue would not occur between those two phones.

In a previous reply you mentioned you have "PBX Delivers Audio" enabled, did you mean on the extensions or on the SIP trunk?