www.amazing1.com sells a Telespy Telephone Intrusion Notification
System, telephone.
www.amazing1.com/security3.htm

$74.50 The telephone looks like my cheap Slimline corded telephone I
bought for about $8.00 at a Wal Mart store a few years ago, but the
buttons are on the handset thingy.I don't tote a cell phone though.If I
did, I would probally buy one of those Telespy telephones, I think.
I had forgotten about www.x10.com I think I will look at their
website.
cuhulin