Cannot Upgrade Firmware – Yealink SIP-T42S – 3CX Hosted V20

[Guillermo Tietzsch]

Hello 3CX Support Team,


I am experiencing an issue upgrading the firmware on my Yealink SIP-T42S phones on my 3CX Hosted V20 system. When I attempt to perform a firmware upgrade, I receive the following error:


“Internal server error occurred. Please contact administrator.”


Details of my setup:

• PBX Version: 3CX Hosted V20
• Phone Model: Yealink SIP-T42S
• Current Firmware Version: [insert your current version here]
• Desired Firmware Version: 66.86.0.180 (latest supported)

I have attempted both bulk and single-phone upgrades, but the error persists. I suspect this may be related to the firmware repository or CDN not being fully accessible for my hosted instance.


Could you please verify if the firmware for the SIP-T42S is correctly available for my hosted region and assist in resolving this upgrade issue?


Thank you for your assistance.


Best regards,

 

[KyriacosS_3CX]

Hello,

Please do the below and let us know if it's all good:

1. Phones > Options > Unsupported Firmware > OK
2. Phones > Options > 3CX Supported Firmware > OK
3. System > Updates > Download your firmware
4. Deploy the firmware on the phones

This should clear and redownload the firmware, clearing any errors to get you through the upgrade.

 

[SteveITS]

This helped me just now, thanks...one server (only) I found I could only update one phone at a time. Checking several and using the Upgrade button didn't seem to do anything except refresh the page. I found if I clicked the (Upgrade) link on one, then quickly a second, the second would show the internal server error. After redownloading, they would update in groups.

This was on 20u7; we're upgrading it to 8 this weekend.

 

[TheodorosG_3CX]

Also please clarify what is the current firmware version of the device,

 

[cybersolutions]

One of two things. Try and factory reset the phone and try it again. Or you will probably have to step upgrade the firmware if its too old.

 

[SteveITS]

These were T43Us. The firmware was current before this last update. I wasn't paying much attention to the old number, tbh...108.87.0.16? .17? All are on 108.87.0.22 now. I was just reporting the above helped.

 

[noneya]

This solved my issue with Snom upgrading to 10.1.215.13, where I was getting a system error when attempting to upgrade.

Thanks!