——  Security ● Defence ● Solution —— 
Cellphone Prison Jamming system

1. Jamming system applies to all public communication standard mobile GSM,DCS,CDMA,PAS,and PHS ect, and it should not affect normal operation which in shield area with standard system, especially the intercom(walkie-talkie).


2. Within the scope of the prison to block (including aisle, dormitory, window, chat room, storage room, toilet, etc.), teaching area, production area and other regulator supervisor may enter which place possible large  violation where hide areas, products shielding effect should be up to 100%.


3. By supervised person who can not reach place,not prone to violate compasses and area of the open area (including the playground, roads, isolation belt, etc.), products of shielding effect should be above 95%.


4. Strictly control the external interference, to ensure the system run time shielding area (including but not limited to prison comprehensive office building and the surrounding residential buildings, etc.) must make sure that we can smooth communication.


5. Because this project belongs to the key security control area, and after the new communication station, the influence of the system must have a higher power redundancy, shielding technology need to have higher  professional electronic countermeasures .


6. Central apparatus room must be for all the shielding device for on-line monitoring, to prevent man-made damage to block equipment, shielding function failure.


Our company according to the requirements provided by the construction, combined with years of experience in construction industry to design provides the solution as following:

After system completion

 1. Scope of surveillance zone: China mobile, china unicome, PHS all can not communication, but does not affect the intercom(walkie-talkie).

2.The system can running 24 hours continuous operation

3.the surveillance zone outer wall distance over 10 meters can guarantee the communication

 4.the whole jamming is given priority to with outdoor, host with antenna separation.

5. Alljammer  host usespecial closed modular design, ensure uniform heat dissipation, anti-seismic , dustproof, moisture proof.

6.Real-time monitoring system, to ensure normal operation of all equipment.

7. shielding the host when abnormal situation occurs, the system automatically alarm, and generate log

8.the electromagnetic radiation after the system is running in line with national GB8702-1988 "environmental electromagnetic health standards," first level standard (safety zone) requirements.


Prison is a special phone shielding system in the construction of digital products, under the situation of prison, he conforms to the prison's current management mode, before the construction of shielding system, strictly for field measurement of the signal, make full use of the landform; For a variety of specialized shielding signal frequency point, to the best effect;Through online detection, prison leadership with a clear understanding of shielding equipment operation.