welcome to HISEA
source:Industry News release time:2021-07-20 Article author:sznbone Popular:Prison Jamming system
An attacker can use a jammer to interrupt the radio connection. Suppressing or preventing radio transmission may, for example, interrupt the image of the surveillance camera. These attacks must be considered protection.
The signal jammer sends a signal of the same frequency (noise or pulse) with a certain strength on a certain frequency, thereby superimposing the original transmission. If jammers are used exclusively, they are called strategic jammers. These devices are also called jammers, and the process is called noise interference.
The jammer can be used in various radio protocols, such as Bluetooth, WiFi, GSM, UMTS, LTE and GPS. Therefore, the specific frequency of the radio protocol is interfered. There are very simple and small devices that can only interfere with radio signals within a limited radius. For example, there is a small adapter for car cigarette lighters that has the function of interfering with GPS signals. A portable device with a battery can reach a maximum distance of 20 meters under optimal conditions, depending on the model. Usually, they interfere with the signal in the room. Powerful fixed equipment can reach a range of 80 meters.
In Germany, the use of jammers is illegal. They are mainly used by investigative agencies and military departments. Some of them are used in prisons to prevent prisoners from making illegal communications. The challenge here is that no outside signals are blocked, such as mobile phone signals for emergency calls. In foreign countries, jammers are sometimes used in movie theaters and theaters so that the incident will not be interrupted by mobile phone signals. Another use is, for example, to block control signals from drones.
If an attacker uses this interference transmitter, it can be used to block the radio link of the surveillance camera or the window sensor of the alarm system. Therefore, a broken connection must always be equivalent to an alarm. In addition, interference can be detected by continuously testing the radio connection between two components using a cable connection. If the connection is interrupted, the jammer is active. Alternatively, but also technically more difficult to solve, you can test the signal level, the strength of the radio signal. If a new strong radiation source is detected here, it may be an interfering transmitter.
Read recommendations:
Mobile Phone Cellular Signal Booster GSM PCS Network Repeater for Garage Basement Signal Repeat
Why do prisons need cell phone jammers?
Popular recommended products
Portable Handheld RF Signal Jammer, Car Lock Remote Control Blocker, 10W Jam Up To 100m
2022-01-13Waterproof Portable 360 Degree Anti UAV Drone Jammer
2020-09-24High Power Handheld Signal Jammer HS-P8J
2020-09-154G/5G Signal Jammer (14 bands)
2020-11-10Portable HS-V8J High-Power DDS Jammer
2020-09-14Related Information
How to solve the problem of recording leakage?
2020-12-03Types of Jammers
2021-04-29The 5G inter-network roaming trial will be launched in the Xinjiang Uygur autonomous region
2023-05-24Assala Welcomes 5G Future Through Strategic Partnership with Ethio Telecom
2025-04-22China to expand 5G application scenarios, boost R&D on 6G
2023-08-04Compared to men, women need the protection of a GPS jammer
2021-09-22GSM signal jammer is allowed in many countries
2021-07-16Jammers can reduce myopia
2021-09-24After Italy blocked access to OpenAI's ChatGPT chatbot, will the rest of Europe follow?
2023-04-05Direct factors affecting the price of signal jammers Prison signal jammer
2021-09-17Why do prisons need cell phone jammers?
2021-09-14How to choose a heart rate jammer?
2021-06-02What's the scope of the signal jammer?
2021-09-16The principle and classification of video anti-jamming device
2021-01-23Is the cell phone signal shielding cabinet suitable for use in meeting rooms?Portable Man-pack Signa
2021-09-03What is the use of cell phone signal shielding?
2021-05-14Vehicle GPS signal jammer
2020-12-28Principal illegally installed cell phone jammer equipment
2021-10-14Can block both 4G and WIFI signals at the same time?
2021-08-13Signal jammer, help college entrance examination, maintain fairness
2020-11-28Interfering products
SSA3000X Plus Series Desktop Style Spectrum Analyzers
2025-04-09HSA-Q1 Handheld RF Spectrum Analyser up to 13.44 GHz
2025-04-09Protek A734 100kHz-4.4GHz Handheld Spectrum Analyser
2025-04-09Low-altitude defense drone portable equipment
2023-11-20Mobile Phone Cellular Signal Booster GSM PCS Network Repeater for Garage Basement Signal Repeat
2023-11-092W Mobile Phone Signal Repeater 1800 2100 2600 MHz Tri-Band 33dBm Network Booster
2023-11-093G Signal Repeater Mobile Phone Signal Booster
2023-11-09Portable Signal Jammer Full Band 21 Channels 2g 3G 4G 5g Mobile Phone Network Lojack Walky Talky Signal Jammer
2023-11-01Professional all-round 360-degree recording jammer air purifier type anti-recording equipment
2023-11-01Anti Spy Remote Control Portable Audio Voice Recording Jammer up to 2m white noise to Privacy Protection
2023-11-01Recording blocker protect your voice information security,air purifier type anti-recording equipment
2023-10-312000m Detection Handheld Drone (UAS) Detection Warning Instrument Detector Dji, Autel and Fpv Drones
2023-10-27Handheld Drone/Uavs Detecter for Detecting Dji/Autel/ Fpv Drones up to 2km
2023-10-25with 2km Drone Controlled Signals WiFi Drone Signal Jammer GSM 900MHz WiFi 2.4GHz 5.8GHz Anti Drone System
2023-10-25Unique Handheld 28 Bands 27 Antennas Wi-Fi6e FM Radio GSM 3G 4G 5g Mobile Phone Jammer
2023-10-23Handheld 24 Antennas 5g Cellphone Signal Jammer with Nylon Cover
2023-10-23Convoy 12 bands RCIED Bomb Jammer
2023-10-23Vehicle Mounted Drone Detection Jamming Integrated Uav Detection, Positioning, and Countermeasures Blocking Units
2023-10-17Portable Drone Detector aeroscope mobile works offline or online can find controller pilot position detection device up to 10km
2023-10-05Vehicle Use-Signal jammer detector for uniform services
2023-09-20Anti-Theft Jammer Detector for Local Command Center
2023-09-20Portable Cellphone Jamming Detector
2023-09-19M8000 RF Signal Detector Anti Spy Tracker Wifi Camera GSM Audio Bug Sweeper
2023-09-188km Ku Band Microwave Alarm Security System Ground Surveillance Monitor/Detector/Sensor/Radar
2023-07-31Full Band Drone Jamming and Navigation Spoofing
2023-07-318kms 300MHz~6GHz RF Uav All Frequency Detection Direction Finding Equipment
2023-07-311.2G 100W anti drone module
2023-07-211.2G 50W anti drone module
2023-07-211.2G 30W anti drone module
2023-07-211.2G 10W/20W anti drone module
2023-07-21Start a conversation to know more about what we have for you…
Get in touch