US Patent 7333798 Telecommunication call management and monitoring system

A secure telephone call management system is provided for authenticating users of a telephone system in an institutional facility. Authentication of the users of the telephone call management system is accomplished by using a personal identification number, biometric means, and/or radio frequency means. The secure telephone call management system includes accounting software capable of limiting access to the system based on funds in a user's account or other related limitations. The system includes management software capable of implementing widespread or local changes to the system and is further capable of modifying or setting any number of user account parameters.