Telecommunication call management and monitoring system with voiceprint verification

A system for tracking inmate location within a controlled-environment facility, the system comprising:

• a plurality of wearable radio frequency identification (RFID) devices, each of the plurality of wearable RFID devices being affixed to a corresponding one of a plurality of inmates, and each of the plurality of wearable RFID devices having a unique property, the plurality of wearable RFID devices including a first wearable RFID device affixed to a first inmate and having a first unique property that includes a modulation frequency of an incident RF pulse;
• a plurality of RFID detectors arranged throughout the controlled-environment facility configured to detect the first wearable RFID device, the plurality of RFID detectors further configured to obtain the first unique property from the first wearable RFID device from the detection of the first wearable RFID device;
• a central processing server configured to receive detection information relating to the first wearable RFID device from multiple of the plurality of RFID detectors, the detection information including the first unique property combined with an activating pulse signal, a time of the detection and an identification of the RFID detector, the central processing server being further configured to calculate a location of the first wearable RFID device based on the receive detection information;
• and
• a communication device configured to receive an identifier of the first inmate for processing a communication,
• wherein the central processing server authenticates the first inmate, and authorizes or terminates the communication, based on the unique property received from the first wearable RFID device and the calculated location, the authenticating including:
• subtracting the activating pulse signal from the detection information;
• isolating the modulation frequency of the first wearable RFID device based on the subtracting;
• and
• identifying the first inmate based on the isolated modulation frequency,
• wherein the location is calculated by determining for each of the plurality of RFID detectors a flight time of a signal transmitted from the wearable RFID device, and comparing the determined flight times.