Prison Phone Service Call Detection

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How Three-Way Calls Work and Detecting Calls through Prison Phone Services

Conference Calls and Detection of Calls in Prison Phone Service Systems

Find Out More about the Three-Way System

With the help of a three-way calling system, a call can be extended to another person while the call is in progress between two people. This is made possible using the facilities in the telephone exchange or by using external equipment. Many homes have of the ability to make conference calls on their telephone.

Why Are Inmates Not Allowed To Make Three-Way Calls In Prison Phone Service Systems?

When inmates in prison are allowed to make three-way calls, they are able to access numbers that they are not normally authorized to call. By allowing this, they can make threatening calls to officials and also conspire with others in criminal activities. Terrorists can even make use of conference calls to plot new crimes. This is why such calls are prohibited for inmates by the prison phone service systems.

More than 10% of people in prisons try to make conference calls and they are invariably related to crime. Recording these calls has led to the prosecution of several inmates indulging in criminal activities. But in most of the cases it has been seen that three-way calls can result in harm to the general public, as inmates can make threatening calls to witnesses and others connected with the crime.

It is easy to initiate a three-way call. The caller must first depress the phone cradle switch for a split second. The telephone exchange is notified that the subscriber wants to make a three-way call and this puts the other person on hold. The dial tone is heard and the caller can dial the number of the third party. When this second call is put through, they must depress the cradle switch again briefly to start the three-way call.

Blocking Of Three Way Calls

All prison phone service systems must have facilities for detection of three-way calls as well as a feature for disconnecting them. Though this feature is mandatory, it has been seen that only 30 to 40% of the cases are effectively detected, while suppliers claim it should be about 80 to 90%. Inmates have developed clever ways to defeat the system of barring three-way calls, as they resort to tapping the mouthpiece, singing and make other noises to avoid detection.

Don't miss our guide to making Prison Phone Calls.

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Prison Phone Service Call Detection

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