Red light flashing


Hello, we have various Grandstream models in our office.

In 2 of our GXP-1628 phones and in 1 of our GXP-2170 phones the red light at the upper right corner keeps flashing. I rebooted the device, I disabled voicemail, I checked all the unanswered calls. I also entered the device menu and there is no possible way to delete or completely remove this feature.

I am desperate. Does anyone have the answer? It is pretty annoying and irritating for the eye to see this light going on and off while working.

Thanks in advance


Clean Voicemail on server then disable.