sundance-communications.com Forums More-Phone & VoIP Systems Other Telephones & Systems Cortelco 2500 schematic

I'm looking for a Cortelco 2500 pictorial drawing. I connected an dual gong with four wires to the network and it changed the phone so it doesn't hang up.

I understand the older networks had an internal capacitor but since this phone was designed for a two wire ball bearing gong ringer maybe the capacitor has been removed?

Interesting, the issue likely has to do with resistance being too low when the phone is on-hook.

Something like this?

Cortelco 50-500-105