FIELD: radio engineering, communication.
SUBSTANCE: enabling an operator to monitor a connection between two communication devices without dedicated recording devices. Using the virtual number, the operator may setup a controlled call between a victim and an offender. The victim is contacted via the virtual number by the operator and optionally informed about the controlled call process. In turn, the offender is contacted using telephone number information of the victim and connected with the victim. Call audio between the victim and offender is transmitted to the operator. When necessary, the operator may terminate the call remotely from the telephone device which the operator used to setup the call.
EFFECT: faster operation.
28 cl, 9 dwg
