Auto-dialer for your prepaid cards!!
Connect directly to telephone line. Users just store the informations of access number, card number, PIN into the memory of auto-dialer,
then when they make a call, they just need to dial the phone number directly. Auto-dialer will help to finish all the steps of dialing access number,
selecting language and dial PIN automatically. So the auto-dialer makes pre-paid IP call just th same the operation of I D D.
More detail of auto-dialer: http://www.wotec88.com/auto-dialer.htm