Matt -

On most KV sets the Y/G pair is wired to the hold lamp. Of course many sets don't have a lamp installed at that spot so not all of them will light <G>.

Some sets allowed the use of a "phantom" 6th button - a "All Buttons Up" Itercom. If all your keys were up you went off hook and got T/R off the Y/Blue pair and lamp off the Y/G pair. Buzzing on the Y/O. Stromberg Carlson sets came standard like this and some WE sets (but I think you had to also pull up one of the hook switch buttons to activate it on a WEco set)

I always used Y/O for buzzers(except on Northern Electric/Telecom Logic sets in which case it was Y/Brown.

Confused enough?


Glad everything works and that you've got Intercom.

You can also add ICM only phones using 2500 phones. Connect G/R to T/R and B/Y to the buzzing pairs, then open the B/Y inside the set and connect a buzzer.

Sam

"Where are we going and why are we in this hand basket?"