Secure credit/debit card authorization

Secure guard for coin-return-bucket window of payphone guard wra

Secure holder for a desk top coin operated telephone

Secured disposable debit card calling system and method

Self-computing credit card telephone paystation method and syste

Smart bucket

Smart card reader and transaction system

System and method for a prepaid bundled telecommunications accou

System and method for administration of an incentive award...

System and method for anonymously establishing telephonic connec

System and method for detecting unauthorized access using a...

System and method for detecting unauthorized access using a...

System and method for implementing calling card security and...

System and method for providing high-speed communications...

System and method for using a prepaid card

System and method for using a prepaid card

System and method therefor of preventing fraud on pay phone...

System for controlling usage of phone debit cards

System for the payment of telephone calls in a private self-swit

Systeme d'authentification analogique reciproque entre un termin