If the doorphone rings in external speakers, that means that the extension or hunt group it is calling has auxiliary ringer enabled, activating a loud ringer through the speakers.

You could always put a closet 7100 with a different loud ringer (Algo), or bust the speaker on this or another phone and send it in your speakers through music source if your self-a speakers go through a Valcom for instance, or with a relay.

If your loud ringer is already Algo, you have everything you need without added hardware.

Yes, I'm a frenchie; have a problem with that?? Well, I do!!