Thank you for the information. It looks like the Pink Module will do the job.

What I have in mind is to build an alarm system that will notify me of any abnormal condition when I am away from home. Idealy, it would identify say 8 zones. I could then call a neighbor to check it out.

There is a commercially available device called a "Freeze Alarm" that will dial numbers and leave a voice message on your answering machine. I think I could build a system for less money and have it do what I want.

Thanks again for the direction.
R.W.S.