Does the loud ringer port on an M7100 provide a contact closure? I need to install a loud ringer on this phone and I hooked up a Valcom loud ringer horn to it (that requires a contact closure) and it wouldn't work. Should I just install a self amplified horn instead?

Thanks in advance
Chris

https://www.algosolutions.com/home.php

try this

It does not have contact closureon phone, but you can get from the KSU. I use self amplified horns on the phones.

Good Luck!!