Abstract: Method, including monitoring an audio signal on a telephone line with a detector and detecting an energy pulse in the audio signal on the telephone line; processing the energy pulse with a processor, where the energy pulse comprises a plurality of frequency components; determining a length of the energy pulse on the telephone line; calculating a phase for each of the plurality of frequency components to generate a plurality of phase values; generating a signal if the plurality of phase values are linear and if the length of the energy pulse is less than 40 milliseconds, where the signal is indicative that the plurality of phase values are linear and that the length of the energy pulse is less than 40 milliseconds, and further indicative that the signal is a three-way call attempt on the telephone line; and transmitting the signal to a host computer.

Abstract: Disclosed is a secure telephone call management system for authenticating users of a telephone system in an institutional facility. Authentication of the users is accomplished by using a personal identification number, preferably in conjunction with speaker independent voice recognition and speaker dependent voice identification. When a user first enters the system, the user speaks his or her name which is used as a sample voice print. During each subsequent use of the system, the user is required to speak his or her name. Voice identification software is used to verify that the provided speech matches the sample voice print. The secure system includes accounting software to limit access based on funds in a user's account or other related limitations. Management software implements widespread or local changes to the system and can modify or set any number of user account parameters.

Abstract: 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.