Patent ID: 8000269

Claim:
A call processing system for processing calls associated with a prison facility, comprising: a first processor-based system coupled to a plurality of telephone terminals disposed within said prison facility, said first processor-based system transmitting first voice signals associated with one or more of said plurality of telephone terminals, wherein the first processor-based system comprises a first unauthorized call activity detector for monitoring fraudulent or unauthorized call activity associated with the calls; and a second processor-based system communicating with said first processor-based system via a digital data link and disposed remotely from the first processor-based system, said second processor-based system configured to: establish calls to called parties requested by the one or more of the plurality of telephone terminals; convert the first voice signals for transmission over a carrier network responsive to receiving the first voice signals via the digital data link; and convert second non-VoIP (Voice over Internet Protocol) voice signals from the called parties received via the carrier network to second VoIP voice signals for transmission to the first processor-based system via the digital data link; and wherein the second processor-based system comprises: a second unauthorized call detector for monitoring the second non-VoIP voice signals to detect the fraudulent or unauthorized call activity in the calls; and a call processing platform for validating a billing limit.