how to find which phone has administrative features?

[kabucek]

<i don't know where to put this question???>>

we are using INTER-TEL 8560 and the time is wrong on display.i know the feature code and everything how to set up this, but i don't know which phone has administrative features...:-/. do i have go to every phone and try codes until i'll find the right one?? or there is a different way to find that admin phone???