By eHow Electronics Editor
Rate: (1 Ratings)
If you 1) want to test the ringer on your home telephone, 2)use the phone as an intercom so you can talk to someone else in the house using 2 extensions, or 3)prank call someone you live with, you need to get your own phone to ring. Dialing your own phone number doesn't work; you get a busy signal because you are already on the phone.