Flash audiocodes c450hd generic SIP firmware - not possible?

[peter_baumann]

I have a C450HD VOIP phone (UC-C450HDEPSG-BW) with a TEAMS firmware and I would like to flash the Generic SIP firmware.

I can't flash it via USB stick because I can't get into recovery mode on the phone, it seems to be locked.

I can download the firmware and copy it to the phone via SSH, but I cannot flash the Generic SIP firmware because the firmware has an .img file extension, I get an error message during the flashing process.

When I try to flash the firmware via SCP, I get the error message “unzip: invalid zip magic AAAAAAAAAA”

I assume that the phone wants a .zip firmware, but the Generic SIP firmware is an .img file.

I try to install the firmware as follows:

C:\Users\Peter\Downloads>scp 450HD_3_4_8_808.img [email protected]:/data/ota_package/update_image.img

[email protected]'s password:

450HD_3_4_8_808.img 100% 45MB 4.5MB/s 00:10

C:\Users\Peter\Downloads>ssh [email protected] local_update.sh

[email protected]'s password:

Archive: /data/ota_package/update_image.zip

unzip: invalid zip magic AAAAAAAA


Can I not install SIP firmware on the phone because the device is locked on the software side or is there a way to switch from the TEAMs firmware to a Generic SIP firmware?



Thank you very much.