I have found a couple of forum posts mentioning what seems to be similar issues, none I found have solutions and they are closed for additional updates.
https://www.3cx.com/community/threads/fanvil-handsets-freeze-periodically.76433/ -Posted Sep2020, closed for replies
https://www.3cx.com/community/threads/fanvil-firmware-change-logs.81876/ -Posted Jun2021, closed for replies
I have installed a new system, with 6 handsets, 3 of which have Bluetooth headsets (Jabra Evolve65)
Initially, we had them powered from the phone USB plug since those headsets don't actually come with a charger... and I noticed phone would freeze/crash and I would have to manually unplug the POE source to force a reboot. Other times a phone would just reboot itself. But otherwise, it worked for a couple of test calls I made while installing the headsets and confirming volume etc. But after training and leaving site, the next day we had reports of the phone freezing and/or rebooting itself.
I then moved the headset power from the phone USB port to a nearby PC USB power source, wondering if it was pulling too much power from the phone/POE and problem persisted. We then upgraded the POE switch from a TP-Link which supported 250W draw to a Cisco 400W capacity in case the TP-Link was causing issues, even though the 6 phones should be drawing less than 15w each. Each one of these steps had no change. Phone would appear working but would at times freeze or reboot - didn't matter if on a call or just sitting on desk unused - and the timing wasn't consistent, but was frequent.
Next step was disabling the Bluetooth on the handset and ignoring the headset altogether. This seemed to fix it, but a day later the client sent me a video of the phone rebooting again. This was a big change from happening 5 to 15 times a day, to working a whole day without noticing a reboot.
Technical details, PCs are getting their internet from the phones.
3CX is v16.0 Update 8 (Build 9) locally hosted on an IP3-NX32Lite
Phones were upgraded to latest firmware at install ~3 weeks ago 2.4.11
Phones with issues only seem to be the ones where Bluetooth was used, and even after turning it off again, problem seems to persist, but at a much lower frequency. I have not been back to factory reset the phones and reconnect them, I am hoping to get some more information on this problem and have a solution for them before doing so.
I have tried to get support from Fanvil directly also, as it seems more likely to me that the fault is on the Fanvil side of things... no response yet. These were recommended handsets from 3CX and it seems this issue has been around a long time without any resolution I could find. I am hoping someone has a solution that I haven't located, or at least can give a reliable update on where 3CX/Fanvil are with their testing and a possible fix.
https://www.3cx.com/community/threads/fanvil-handsets-freeze-periodically.76433/ -Posted Sep2020, closed for replies
https://www.3cx.com/community/threads/fanvil-firmware-change-logs.81876/ -Posted Jun2021, closed for replies
I have installed a new system, with 6 handsets, 3 of which have Bluetooth headsets (Jabra Evolve65)
Initially, we had them powered from the phone USB plug since those headsets don't actually come with a charger... and I noticed phone would freeze/crash and I would have to manually unplug the POE source to force a reboot. Other times a phone would just reboot itself. But otherwise, it worked for a couple of test calls I made while installing the headsets and confirming volume etc. But after training and leaving site, the next day we had reports of the phone freezing and/or rebooting itself.
I then moved the headset power from the phone USB port to a nearby PC USB power source, wondering if it was pulling too much power from the phone/POE and problem persisted. We then upgraded the POE switch from a TP-Link which supported 250W draw to a Cisco 400W capacity in case the TP-Link was causing issues, even though the 6 phones should be drawing less than 15w each. Each one of these steps had no change. Phone would appear working but would at times freeze or reboot - didn't matter if on a call or just sitting on desk unused - and the timing wasn't consistent, but was frequent.
Next step was disabling the Bluetooth on the handset and ignoring the headset altogether. This seemed to fix it, but a day later the client sent me a video of the phone rebooting again. This was a big change from happening 5 to 15 times a day, to working a whole day without noticing a reboot.
Technical details, PCs are getting their internet from the phones.
3CX is v16.0 Update 8 (Build 9) locally hosted on an IP3-NX32Lite
Phones were upgraded to latest firmware at install ~3 weeks ago 2.4.11
Phones with issues only seem to be the ones where Bluetooth was used, and even after turning it off again, problem seems to persist, but at a much lower frequency. I have not been back to factory reset the phones and reconnect them, I am hoping to get some more information on this problem and have a solution for them before doing so.
I have tried to get support from Fanvil directly also, as it seems more likely to me that the fault is on the Fanvil side of things... no response yet. These were recommended handsets from 3CX and it seems this issue has been around a long time without any resolution I could find. I am hoping someone has a solution that I haven't located, or at least can give a reliable update on where 3CX/Fanvil are with their testing and a possible fix.
