Why do prisons have to have cell phone jammers now?

Garcia of Cebu’s third district then asked how cellphone signals between the supposed drug lord and the contact outside could get through if the jammer was on. BUCOR also admitted that the cell phone jammer installed inside NBP are not working properly. “Marami na tayong jammer na sira. Ang problema diyan walang capital outlay, walang procurement,” said BuCor S/IPT Robert Rabo. (We have plenty of jammers but not working, and the problem now is we don’t have capital outlay that why there is no procurement.)

Although the phone jammer is so effective. Rabo admitted that there are also concerns about the effectiveness of signal jammers, adding there are no jammers at the Medium Security Compound.Garcia said installing jammers “is a tacit (admission) of the fact that they (officials) cannot even implement that policy (prohibiting the use of cellphones). “There is, I suppose, an existing policy to block all cellphone communications (from inmates). We bought (signal) jammers. In other words, cellphones are illegal. The reason you’re putting in jammers is because even if these are banned, I don’t know how cellphones still find their way inside (the NBP),” Garcia said. Of course, the signal jammerdevice only prevents prisoners from using their phones, and it doesn't stop them from smuggling.

Cell phones are full-duplex devices, which mean they use two separate frequencies, one for talking and one for listening simultaneously. Some jammers block only one of the frequencies used by cell phones, which has the effect of blocking both. The phone is tricked into thinking there is no service because it can receive only one of the frequencies.

The renewed interest in jamming within federal facilities follows an announcement by Deputy Attorney General Rod Rosenstein, who told a national meeting of corrections officials that federal prisons would start testing the technology anew.

Communication jamming devices were first developed and used by military. This interest comes from the fundamental objective of denying the successful transport of information from the sender (tactical commanders) to the receiver (the army personnel), and vice-versa.

The Drive explains why the USAF is determined to use GPS spoofing and jamming technology but offers no insight into what a GPS blackout might mean for the millions of civilians who live in the Western region of the US.

Jammers have a profound effect on America

GPS denial is a becoming a huge issue for American military planners. Peer states, especially Russia, are already putting GPS spoofing and jamming tactics to work during various training events near their own borders. We have discussed this situation in great depth before, and I would suggest you read this article to understand just how deeply the loss of reliable global positioning system data can mean for the U.S. and its allies during a time of war, as well as what is being done to overcome such a monumental hurdle.

The negatives here could summarily be listed as a shorter range—the MKII’s GPS signal jammer capabilities reached up to 1.2 miles, in contrast to the Tactical’s 0.5-miles-and-unspecified-change—and the fact that there’s no FCC approval to use this jamming gun as a regular civilian. Ultimately, Perfectjammer’s new product is for those already sure about their need of any potential anti-drone tech.

The rifle’s jammers can shut down signals at 433MHz, 915MHz, 2.4GHz, and 5.8GHz RF bands simultaneously, ensuring it covers all the most common signal frequencies drones use for communication, with the option to also create GNSS disruption (basically, GPS and GLONASS won’t work correctly). With the signal shut down, any drone in the vicinity will be forced to land on the spot or return back to its starting point, depending on how its internal algorithms are set up, giving folks the ability to retrieve it for investigation (if it lands) or sending back a potential threat (if it returns home). When jammed, the drone’s video transmission is also immediately ceased, so it can no longer transmit any footage to the operator.

Reference linking:

https://www.perfectjammer.com/v-powerful-12b-mobile-blocker-demo.html

https://www.perfectjammer.com/v-anti-gps-handheld-wifi-blocker.html