What is the blocking frequency of Cell Phone Jammers

What is the

blocking frequency of  Cell Phone Jammers ?
This environment is very noisy radio environment, it is even more obvious advantages. Another advantage of Bluetooth technology is that it applies globally uniform frequency setting, which

eliminates the "border" barriers, while in the field of cellular mobile phones, this obstacle has plagued users for many years.
In addition, ISM band is open to all band radio systems, the use of one of these bands will encounter unpredictable sources of interference.  Cell Phone Jammers  can run and work well after

switching on and pressing the button. For example, some appliances, cordless phones, garages door openers, microwave ovens, etc., are likely to be interference. For this reason, the Bluetooth

technology, especially designed to quickly identify and frequency hopping scheme to ensure that the link stability. The frequency hopping technique is divided into a number of hopping channels (hop

channel), in a single connection, the radio transceiver according to a certain code sequence continuously from one channel to another channel, only the sender and receiver to communicate is based

on the law , and other interference can not be carried out by the same laws of interference; hopping the instantaneous bandwidth is very narrow, but through spread spectrum technology to make this

into a narrowband or broadband to expand exponentially, so that interference effects may become very small. Background of  Cell Phone Jammers  has something to do with use of cell phone in the

meeting room, examination room, petrol station, gas station, court, church, military place and so on where using of cell phone is forbidden.And other work in the same band systems, Bluetooth

frequency hopping faster, shorter packets, which makes Bluetooth more stable than other systems.
Chipset mainly refers to the Bluetooth headset Bluetooth chips used in the design of the composition. Bluetooth chip on the market today many manufacturers. Major telecommunications manufacturers

have designed in accordance with Bluetooth standards have different chipsets.
The emission power of  Cell Phone Jammers  is 30±3dbm. If the Bluetooth-enabled mobile phone with a Bluetooth headset with a Bluetooth headset must support two protocols: Headset profile (Headset)

and HandsFree Profile (Hands-free).
Slightly before the establishment of the network, all devices are in the ready state. In this state, the device is not connected monitor once every 1.28s news, equipment, once awakened, in the pre

-set frequency hopping on 32 monitoring information. The slow-start time of  Cell Phone Jammers  is 3s. The number varies from region to region hopping, frequency hopping, but the vast majority of

32 countries. Connection from the main device initialization process. If a device's address is known, on the use of pages of information (Page message) to establish a connection; If the address is

unknown, followed by pages of information on the use of query information (Inquiry message) to establish a connection. In a piconet, no data transmission equipment to the energy conservation

condition. Master device can be set to keep the way from this time, only the work of the internal timer; can also request from the device into hold mode.