Call Management System for Secure Facility Tone Detection

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Solution Overview

Problem

In controlled facilities like jails and prisons, existing communication management systems fail to effectively prevent inmates from violating communication restrictions, particularly by detecting and preventing calls between inmates in different facilities.

Innovation Solution

A method and system that connects inmates to calls only after verifying all parties, tests incoming audio for a controlled facility tone to detect violations, and transmits notifications when such tones are detected, using a network application with a connection module and call analysis module to enforce communication restrictions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If existing communication management systems are used, then inmates can communicate with individuals outside the detention environment, but the systems fail to detect and prevent calls between inmates in different facilities

Engineering Contradiction:

Improvecommunication restriction enforcementVSAvoidcall monitoring system

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent introduces a call analysis module as an intermediary component between the existing communication management system and the call audio stream. This module specifically detects controlled facility tones in incoming audio to identify calls originating from other facilities, thereby enabling detection of prohibited inmate-to-inmate communications without requiring complete system redesign

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent segments the call monitoring function into distinct modular components: a connection module that manages call setup and verification, and a separate call analysis module that specifically tests incoming audio for controlled facility tones. This segmentation allows the tone detection capability to be added independently to existing systems without increasing overall system complexity

Inventive Principle:

Principle #1Segmentation

2Reliability

If all parties are verified before connection, then communication security is improved, but call setup time increases

Engineering Contradiction:

Improveauthorization verificationVSAvoidcall setup time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent implements preliminary verification of all call parties before connection is established. The connection module verifies that each party is authorized to speak with the inmate and confirms that each party accepts the multiparty call before connecting them, ensuring security requirements are met while streamlining the verification process

Inventive Principle:

Principle #10Preliminary action

3Reliability

If incoming audio is tested for controlled facility tones, then violation detection is improved, but system processing load increases

Engineering Contradiction:

Improveviolation detection accuracyVSAvoidaudio processing energy

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent extracts only the essential detection function - testing incoming audio for controlled facility tones - from the broader call monitoring system. The call analysis module focuses specifically on detecting the presence of facility tones in the audio stream, rather than analyzing all audio content, thereby reducing processing load while maintaining effective violation detection

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS9232051B2Call management for secure facilities

Publication Date: 2016.01.05 INTELMATE LLC

AI summary

A method for controlling a call in a first controlled facility includes connecting an inmate in the first controlled facility to the call when each party of the call is verified, testing incoming audio on the call to detect a controlled facility tone from a second controlled facility, and transmitting a notification of a violation by the inmate when the controlled facility tone is detected in the incoming audio.