Patent ID: 8917848

Claim:
An apparatus for controlling a call in a first controlled facility, comprising: at least one processor; at least one network interface; a memory; a software application, physically stored in the memory, comprising instructions operable to cause the at least one processor and the apparatus to: connect an inmate in the first controlled facility to the call when each party of the call is verified; test incoming audio on the call to detect a first controlled facility tone from a second controlled facility; test incoming audio on the call to detect a second controlled facility tone from the first controlled facility; transmit a notification of a first violation by the inmate when the first controlled facility tone is detected in the incoming audio; wherein the first controlled facility tone is a first coded-pattern multiple notch filter tone; wherein the second controlled facility tone is a second coded-pattern multiple notch filter tone; and wherein the first coded-pattern multiple notch filter tone is a first pre-defined pattern tone and the second coded-pattern multiple notch filter tone is a second pre-defined pattern tone wherein both the first and second pre-defined pattern tones are detectable, when both are present on the incoming audio, via bi-modal telephony band pass edge filtering of the incoming audio.