The Viking unit - you need to tear apart the phone, solder in wires off the speaker and run to the unit. Then everything the speaker does is amplified - ringing and if you use speaker phone your conversation. OOOPS ! ! !

I would go with the Algo - connect to the Aux Relay. Make sure nothing else rings the Aux ringer except that phone. Then when that phone rings you hear it. Unless you put it on DND.


If CON is the opposite of PRO
Then what is the opposite of Progress?