Strategy

The firmware upgrade strategy on 3CX Platform is as follows:

1.Every 2 hours 3CX downloads the applicable latest firmware for IP phones mapped to extensions.

2.IP phones not running the latest firmware are highlighted in red in the “Phones” function.

3.To upgrade the firmware, select one or more phones and click the “+Firmware” button.

4.Confirm the phone’s firmware from the upgrade list and click “Upgrade”.

5.The firmware is uploaded to the phone, possibly rebooting the phone several times.

What we need know is that the latest firmware of phone will be download when you click “Upgrade” on the Phones page, or you click “Download” on the Updates page.

And the server will download the firmware to a temp path which used to save New Firmware, and then move it to the finally path using to upgrade the phone when you click “Upgrade”.

Upgrade issue on new hardware model

This strategy will cause an issue when we use those phones with new hardware——this change occurred because the old hardware has been discontinued.

The phone with new hardware will use firmware named fw900M.rom or fw920M.rom, but the model name has not changed. The relevant models are as follows:

And the issues occured.

For example, if you use new UC924, it uses fw920M.rom. But 3CX still recognizes it as UC924 and uses fw924.rom for it. This will cause the automatic upgrade mechanism to fail.

Solution

To solve this issue, we are discussing with 3CX and we are reaching the final line. But till we reach, we need a temporary solution. 

On-premise

If you are using a local server, please refer to the following steps to replace Rom under the path.

Replace the firmware on the 3CX PBX with the new version, and then the phone is restarted.

Setp1: Locate the folder where the firmware is placed. There is an example:

Setp2: Place the firmware you need into it, if there is an old firmware exists, replace it.

Step3: Restart the phone. (This phone should already be provisioned by 3CX)

Clould

If you use the cloud server, you can hardly to upgrade the phone using 3CX automatic mechanism if you only have a single new hardware model like UC923. And we recommended you temporarily upgrade these phones by an external HTTP server.

To upgrade the new hardware model - UC902/UC903/UC912/UC912G, you need a UC912E to let 3CX server download fw900M.rom, and for the others new hardware model - UC923/UC924/UC926, you need a UC924E or a UC 926E.

And after 3CX download fw900M.rom or fw920M.rom, then the new hardware phone can upgrade through the internal HTTP/s server of 3CX.

Finally, I'm sorry to cause you trouble, but we hope that the discussion with the 3CX team can end as soon as possible.

Thank you for your cooperation.