I Currently have Electra 824 System with ETZ 16-1 Phones and I was wondering how to do the following: (Don't know if I need ETZ 16D-1 LCD Phone to program?)

1. Display CO Lines and Extension lines at each station.
2. Program CO Lines 1-4 to buttons on each station.
3. System has voicemail card, needs to be reset, as old password and ID are locked. Need administrator access code or manual reset?

Thanks for you assistance!