The Passive GSM Interception System is a multi-channel tunable GSM Monitoring system. Each receiver is independently tunable to any BTS of the GSM Network. GSM Monitoring system is intended to ensure interception and deciphering of voice conversation from standards GSM-850/900/1800/1900MHz Cellular network in stationary or in mobile environment.Passive GSM Interception System also intercepts registration and service channel information from the cellular network.

Passive GSM Interception System is capable of doing various tasks while conducting monitoring. GSM Monitoring System compress and stores intercepted voice call’s, SMS’s and protocol information on the control PC hard drive.

It also called off the air Monitoring System, has the friendly user interfaces, which allows the user to adjust system on the various kind of tasks, to provide the control of system during its operation.

Passive GSM Interception System online deciphers A5.0 and A5.2 ciphering algorithms used in the GSM network to cipher the user's communication. To prevent detection of the system's operation and avoid interference to the operation of cellular network the System works as a passive equipment intercepting data directly from the air. The number of channels, being received and recorded by the system, can be from 1 to 32 for one control computer.

On line monitoring up to 16 duplex channels. Interception Monitoring and logging of GSM- 850/900/1800/1900MHz communication standards in stationary or in mobile environments.

Automatic tuning of the Receivers, with a possibility of scanning and recognition of control channels and communication system parameters.

Automatically detects, decipher the ciphering algorithms used on the network in real-time and recording of cell phone conversations, call related information, network information to the hard disk of the system.

Direction Finding Equipment can be integrated with a digital map of the location into the System.

Receiver's management with neighbouring cell details for network handover information.

Switching ON/OFF the recording of conversations, network information and other parameters.

Display current status of receivers (recording/ scanning) and target numbers.

Display subscriber's distance/location from the Base Station.

Several Passive GSM Interception System can be configured in a LAN environment to provide a near-exact physical location of the target and to form a Central Monitoring Station.

Provision of reliable reception of the information from channels of cellular communication systems with possibilities of noise-resistant coding.

Simplicity of maintenance, which does not require a deep knowledge, either in the field of computers, or in the field of cellular communication systems.

Scanning of GSM network parameters in the controlled area (Service Provider, Broadcast Channel No., LAC, Cell IDs, Signal Levels).

On-Line listing of the Cell phone calls.

Possibility of locating the target from a target tracking hardware.

Possibility of round-the-clock operation in an auto mode without the operator involvement.

Real-Time Passive Deciphering of A5/2, A5/0, A3, A8, A5.

Selection of the Targets by different parameters such as IMEI, IMSI, TMSI, Target distance from the base station, Type of target handset, Target's dialed & received number (PLMN).

Interception and Monitoring of Short Message Service (SMS) traffic.