so. Typically on ANY ESI system...if a Digital phone is not plugged in and you attempt to call it from another phone , you
will hear " you have dialed an invalid extension " and then get intercom dialtone back.

Originally Posted by Professor Shadow
For the key in question, what is in the display after pressing PROG/HELP, 0, 3 and then the lit key?


I Think what he really meant was " program/help , 2, then the key that is lit " then what is in the display


I can see the light at the end of the tunnel..

Retirement 2019 ( It has happened )