The Client has a 2yr old Nutone intercom system.
the Door station has a standard Doorbell button. No Light.

When you press the button it rings the intercom system.
there is a traditional doorbell Bell as well. when i hookup the wires from the 24vac Bell to the incoming dry contact both don't work.
so i was thinking about
[Link: elkproducts.com]
however this is 12-24vDC not AC.
therefor I am looking for a similar product in AC.
Basically change a Wet Contact closure to a Dry.