I would like to ask for help with P550 and Cisco 7911, 7941G phones. I know that the phones are no longer supported, but unfortunately we are a school and cannot buy new ones, but we managed to get a center, which is a Yeastar P550 and we want to use it with the existing phones, which are Cisco 7911 and 7941G.
I found a description here for the phones, but it was for the S series switchboard. I tried, but it didn't work very well, the phones don't register.
Thank you very much for your help, it would be great if it worked, because unfortunately we can't get new phones...
Thanks, Balázs