Gentlemen: Sorry to be behind in responding to your always sage advice and comments. I have been busy trying to move into the new old house where I would like to install my 1A2 system. Anyway, sorry about the ITT 601/611 confusion. I thought it was a 611. Sam, the application I had in mind was something such as lifting a handset by the back door and it automatically ringing the kitchen phone. I still am not sure if I want/need the 415 or 416 card after reading your comments. What do you think? What is manual vs. automatic mean on these KTU cards?

Bill