How does the IP phone autodialer work? Pre-paid phone calling card usually has 1. Access number, which is the ID of carrier or service 2. Card number, which is the ID of the card 3. Pin, which is the key for the card. The card owner, dials the access number, and after connected, dial the card number and pin and then dial the international tel. Number that he or she wants to talk with. IP phone autodialers could do all the steps for you. All you need is just dial directly just like common idd If you are interested, please advise your earliest, so as to enable us to provide you with detailed qualifications from our end. It will appreciate..