Solved v16 - Firmware Upgrade Fails - Yealink T46S

[SenTechOps]

We currently have a number of Yealink T46S and T46G handsets on a v16 3CX system.

The T46G handsets have updated to the latest firmware, but none of the T46S devices have.

They are currently on 66.83.0.55 but 66.84.00.95 is on the 3CX server and available.

Logging into the Web interface on each of the T46S devices, and attempting a manual update starts to work, but then stops with "Firmware update failed' after about a minute.

Any thoughts as to what might be wrong?

 

[JohnS_3CX]

Hi @SenTechOps

Please take a look at our guide here: https://www.3cx.com/sip-phones/yealink-t4-series/

Step 1 has something that can help you move to the 66.84.x.x series firmware

 

[SenTechOps]

Perfect, that was the missing bit of information. Update to .35 first, and then on to the latest version. Thank you!

 

[JohnS_3CX]

Glad to help!