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Prison Signal Jammer
The Madoors USA PJ-500W Prison Signal Jammer is an intelligent high-power 6-band cellular, WiFi, Bluetooth, and drone frequency jamming system designed for open, semi-open, and closed prisons and detention centers — blocking unauthorized mobile phone use by prisoners while allowing authorized phones to operate, preventing drone entry into prison perimeters, and stopping the transfer of prohibited materials including weapons and drugs via drone delivery. The PJ-500W is more than a standard cell phone jammer — it is a smart jamming system that detects unauthorized mobile phone use and movement in designated areas and manually or automatically blocks all phones in the available space, with remote ON/OFF control for centralized management of multiple jammer units across large prison facilities.
Available in 300W, 450W, 500W, and 600W total output configurations, with six independently controlled and power-adjustable frequency bands, directional high-gain sector antennas providing 100 to 350 meter jamming range, aluminum alloy casing with anti-dust, anti-water, and anti-abrasion construction, and operating temperature range from -32°C to +70°C, the PJ-500W is deployed at prisons, military facilities, police stations, border checkpoints, government buildings, critical infrastructure, and any controlled environment requiring cellular communication management.
TECHNICAL SPECIFICATIONS
The PJ-500W provides the following frequency band coverage and output power:
CDMA 800 — 850 to 894 MHz at 47 dBm ±1 dBm — 50W. LTE — 790 to 826 MHz at 47 dBm ±1 dBm — 50W. 3G — 2,010 to 2,170 MHz at 47 dBm ±1 dBm — 50W. DCS 1800 — 1,805 to 1,880 MHz at 47 dBm ±1 dBm — 50W. PHS — 1,920 to 1,990 MHz at 47 dBm ±1 dBm — 50W. WIMXA — 2,570 to 2,690 MHz at 47 dBm ±1 dBm — 50W.
Total system output power is selectable at 300W, 450W, 500W, or 600W — with the appropriate power level selected for the coverage area, building penetration requirement, and jamming range needed at each specific facility. Each frequency band is controlled by an independent RF on/off switch and individually adjustable power knob — allowing the operator to include or exclude specific bands and adjust the power level of each band independently without affecting other bands.
The system uses 3-port directional sector antennas — 2 sets — providing focused directional coverage across the facility boundary rather than omnidirectional coverage that would extend jamming beyond the facility perimeter. Jamming range is 100 to 350 meters depending on the drone model and mobile device type at the specified total output power.
Power supply: AC 220V/50Hz and DC 24V. Total power consumption: 900W. Connector type: N-female. Chassis: aluminum alloy. Operating temperature: -32°C to +70°C — providing operational capability in all climate zones from arctic to desert conditions.
The system uses special technology that prevents interference between frequency bands — maintaining clean, consistent jamming performance across all six bands simultaneously without inter-band degradation. Critically, the PJ-500W only interferes with the downlink frequency of the mobile system — the signal path from the base station to the mobile phone — without disturbing the base stations themselves. This downlink-only jamming approach prevents the regulatory violation and service disruption to the surrounding community that uplink jamming would cause.
KEY FEATURES
Intelligent Smart Jamming — Authorized Phones Allowed
The PJ-500W is designed as an intelligent cellular jailbreak jammer — distinguishing between authorized and unauthorized mobile phones and blocking unauthorized devices while allowing authorized phones to operate. This intelligent discrimination capability allows prison administrators, correctional officers, emergency services, and authorized facility staff to maintain mobile communication while completely blocking prisoner phone access. The cellular detector assembly functions as a detection hub working in conjunction with the jamming component to provide this authorized/unauthorized discrimination.
Drone Frequency Blocking — Contraband Prevention
The addition of drone operating frequencies to the PJ-500W's jamming capability directly addresses the growing use of commercial drones to deliver prohibited materials — weapons, drugs, mobile phones, and other contraband — over prison perimeter walls to prisoners in the exercise yard. The drone frequency jamming prevents drones from entering the prison perimeter under remote control — the drone loses its control signal at the facility boundary and cannot proceed to the delivery point. This anti-drone capability transforms the prison signal jammer from a communications security device into a comprehensive prison perimeter security system.
6 Independent Bands — Individual Power Adjustment
The six independently controlled frequency bands with individual RF on/off switches and power-adjustable knobs provide precise control over the jamming coverage profile — the operator can include or exclude specific cellular technology generations, adjust power levels to match the coverage requirement of each area within the facility, and adapt the jamming configuration to the specific cellular operators and frequency allocations present in the facility's geographic location. This independent band control eliminates the over-jamming of frequencies that are not present in the local network — maintaining efficient power use and avoiding unnecessary coverage extension.
Downlink-Only Jamming — Base Station Non-Interference
The downlink-only jamming principle — interfering only with the signal from base station to mobile phone without disrupting the base station's uplink reception or transmission — is the technically correct and legally required approach to authorized facility jamming. Uplink jamming would disrupt the base station's ability to communicate with all users in the surrounding area, affecting the public mobile network beyond the facility. Downlink-only jamming contains the effect within the facility's coverage footprint, preventing service disruption to the surrounding community.
Remote ON/OFF Control — Centralized Multi-Unit Management
The remote ON/OFF switch control allows the complete PJ-500W system to be activated and deactivated from a central control position — essential for large prison facilities where multiple jammer units are installed in different buildings and areas and must be managed from a single control room. Remote control allows the facility administrator to selectively activate jamming in specific areas while maintaining communication in others, or to deactivate all jammers simultaneously for emergency situations requiring unrestricted mobile communication.
Aluminum Alloy Construction — All-Weather, All-Environment
The aluminum alloy chassis provides the combination of lightweight construction, heat dissipation efficiency, dust resistance, water resistance, abrasion resistance, and corrosion resistance required for continuous outdoor and indoor installation in the demanding environments of prison facilities, military installations, and critical infrastructure sites. The heat dissipation design manages the thermal output of the 900W power consumption system — maintaining reliable, continuous operation without thermal shutdown at the rated output power.
300W to 600W Power Options — Coverage Area Matching
The four total output power options — 300W, 450W, 500W, and 600W — allow the system to be matched to the specific coverage area requirement of each facility. Smaller facilities or individual building coverage is served by the lower power options. Large open prison campuses with multiple buildings and outdoor areas require the higher power options to achieve the 100 to 350 meter jamming range across the full facility perimeter. The selectable power levels also allow compliance with any applicable power limits specified in the facility's jamming authorization.
Operating Temperature -32°C to +70°C — Global Deployment
The extreme temperature operating range from -32°C to +70°C covers the full range of climate conditions encountered at prison, military, and critical infrastructure facilities worldwide — from arctic northern deployments through to desert and tropical facility locations. This temperature range eliminates climate-based system availability limitations and confirms year-round continuous operation capability at any global deployment location.
FREQUENCY BAND APPLICATIONS
CDMA 800 & LTE coverage addresses legacy CDMA networks and the most widely deployed 4G LTE mobile network frequencies used by major cellular operators globally. 3G coverage addresses the third-generation mobile network frequencies used for both voice calls and data connections. DCS 1800 addresses the 1800 MHz GSM band widely deployed in Europe, Asia, and other regions as the primary 2G and 4G network frequency. PHS addresses the Personal Handy-phone System frequencies used in specific Asian markets. WIMXA addresses the 2.5 GHz band used for advanced 4G and early 5G mobile deployments.
Drone frequency addition covers the 2.4 GHz and 5.8 GHz industrial, scientific, and medical bands used by commercial drone remote control and video transmission systems — the standard frequency pair that virtually all commercial delivery drones use for their control links.
ASSEMBLY & INSTALLATION SEQUENCE
Facility Survey & Coverage Planning
The facility layout, building footprints, perimeter dimensions, and specific areas requiring jamming coverage are confirmed. Required jamming range, building penetration requirements, and authorized phone management approach are confirmed. Total output power level is selected.
Antenna Position Selection
Directional sector antenna positions are selected to provide overlapping coverage across the full facility interior and perimeter — ensuring complete coverage without significant gaps where unauthorized mobile communication would be possible. Antenna positions on building rooftops, walls, and towers are confirmed for optimal directional coverage.
PJ-500W Unit Installation
The aluminum alloy jammer unit is installed at the confirmed positions — mounted securely with appropriate weather protection for outdoor installations. Ventilation clearance for heat dissipation is verified.
Antenna Connection & Alignment
The 3-port directional sector antenna sets are connected to the N-female output ports and physically aligned to provide the confirmed directional coverage pattern. Antenna cable routing and weatherproofing are completed.
Power Supply & Remote Control Connection
AC 220V/50Hz or DC 24V power supply is connected. Remote ON/OFF control wiring or wireless control interface is installed between the jammer units and the central control room.
Frequency Band Configuration
Each of the six independent RF bands is switched on/off and power-adjusted to the facility's specific jamming requirement — authorized bands at confirmed output levels, excluded bands switched off, and power levels matched to the coverage area requirement.
Coverage Testing & Authorized Phone Verification
Jamming coverage is tested across the full facility area — confirming unauthorized device blocking at all positions within the perimeter. Authorized phone operation through the intelligent discrimination system is verified. Remote control activation and deactivation is tested from the central control room.
DEPLOYMENT SCENARIOS & USE CASES
Madoors USA PJ-500W Prison Signal Jammers are specified for any controlled facility requiring cellular communication management and drone exclusion.
- Prison cellular and drone signal jamming systems
- Detention center unauthorized phone prevention
- Military base cellular communication control
- Police station controlled communication management
- Border checkpoint cellular signal restriction
- Government building cellular security management
- Drug rehabilitation center communication control
- Court complex unauthorized phone prevention
- Chemical industry and petroleum depot cellular restriction
- Nuclear power plant cellular security management
- Oil refinery and gas station communication control
- Sports stadium VIP event cellular management
- Museum and cultural institution cellular control
- Campus and educational facility examination security
- Any controlled facility requiring intelligent cellular jamming with drone exclusion
- Category: Signal Jammers & GSM Blockers