T48G in v20 via SBC not provisioning

[A.Takacs]

Hello


We have recently migrated from on premise v18 to hosted v20.
Overall it went well but we have a few Yealink l T48G that will not work anymore. I understand this is an unsupported model but from https://www.3cx.com/sip-phones/manually-provision-yealink/ It seems it would still be possible to use them.

I have tried the above procedure and the phone won’t provision (only the T48G – all others are ok). Is there any log I could look into ? Any further suggestion ?

Thanks for any pointer.

 

[ivank]

Hi!

From the Web Admin / Dashboard navigate to the event log (see the lower pane).
Look for "RPS successfully delivered" event or similar referencing your MAC address.
Soon after the phone factory reset you should also see the phone request to get the config.

 

[JohnS_3CX]

Also make sure the T48G is using this firmware: https://www.3cx.com/docs/phone-firmwares/

It contains cipher updates that will allow it to provision over HTTPS.