Diagram Diagosis

The antenna of mobile phone jammer should be perpendicular to the ground
Introduced Vodafone (LSE: VOD NYSE: VOD) (Vodafone) is a multinational mobile phone operators. Newbury (Newbury), headquartered in Berkshire County, England and Dusseldorf, Germany. Is currently one of the worlds largest mobile telecommunications network company, have investments in 27 countries around the world. Do co-operate with the local mobile phone operators in 14 countries, the mobile phone network of associates. As of December 31, 2004, Vodafone has about 151.8 million users in the world. Vodafone Vodafone Group as the name listed on the London Stock Exchange (code VOD.L) and the NYSE (symbol VOD). mobile phone jammer can be installed in the ceiling in the hall.
AT & T will be the "information superhighway" the plan participants. Will achieve the ideal of mankind - the establishment of a global information service system, so that people anywhere convenient to contact, the sharing of information resources to meet the advent of the information society. Germany Vodafone vodafone Vodafone (in vodafone KK) is the worlds largest mobile communications operator, and its network covering 26 countries, and to provide network services in 31 countries and their partners, over 179 million users worldwide. Vodafone has the worlds most comprehensive enterprise information management systems and customer service systems, service delivery, increase customer has a strong advantage in creating value. Here will show the bulk shielding of mobile phone jammer in a building.
In addition to Spains four stock (Madrid, Barcelona, Bilbao and Valencia), Spain, the telephone companys stock is still in London, Paris, Frankfurt, Tokyo, New York, Sao Paulo, Limas stock market and London the SEAQ International stock trading system to trade. In order to remain invincible in the fierce competition in international telecommunications market, the telephone company in Spain organized a series of international business lines, operated by an independent company. Such a flexible management style is conducive to take measures according to their characteristics, can also enhance the financial strength through joint ventures. Not long ago, the Spanish telephone company into the Internet field, by the same company responsible for production and sales operations. Shielding effect of mobile phone jammer is dependent on room size.
Meanwhile, Cisco Systems, Inc. is building the backbone of the Internet, more than 80 percent of the Internet backbone routers is Cisco Systems, the companys products. Texas Instruments (TI) - Texas Instruments Incorporated is a global semiconductor company, is the world leader in digital signal processing and analog technologies and suppliers, the semiconductor engines of the Internet age. The worlds first integrated circuit (IC) was invented by TI engineer Jack Kilby. The company is headquartered in Dallas, Texas, its business, including semiconductor, industrial, electronic materials, educational products. Companies in over 25 countries worldwide and has manufacturing or sales organization. In this method, there is no need to install mobile phone jammer on the outer wall of every floor.

Cell Phone Jammers has no radiation towards the human body.
Although almost all manufacturers have in recent years tend to use lithium-ion battery, but the worlds major mobile phone manufacturers the choice of battery or have their own characteristics and habits, such as once in the same historical period: Nokia: The Ni- MH (nickel-metal hydride) battery, LiB (liquid lithium-ion) batteries, not the use of LiP (polymer lithium-ion) batteries. Ericsson: The Ni-MH battery, LiB battery, LiP batteries. Motorola: The Ni-MH battery, LiB battery, did not use LiP batteries. Not difficult to find, from the earliest use of mobile phones LiP polymer lithium-ion batteries on this matter, Ericsson reflect the true nature of their cell phone technology pioneer. According to the information I find that, at present polymer lithium-ion battery factory in Japan SONY, Panasonic, GS, several companies, produced in 2000 reached 21 million, of which 50% of Ericsson mobile phone support. 
This environment is very noisy radio environments, it is even more obvious advantages. Another advantage of Bluetooth technology is that it applies globally consistent set of frequencies, which eliminates the "border" barriers, while in the field of cellular mobile phones, this obstacle has been plagued users for many years. In addition, ISM band radio system for all the bands are open, so use one of these bands will encounter unpredictable sources of interference. For example, some appliances, cordless phones, car room door openers, microwave ovens, etc., are likely to be interference. The inspection report of Cell Phone Jammers needs the signature of the director of Cell Phone Jammers workshop.
To this end, the Bluetooth technology, especially designed to quickly identify and frequency hopping scheme to ensure that the link stability. Band frequency hopping is to be divided into a number of hopping channels (hop channel), in a single connection, the radio transceiver according to a certain code sequence constantly jump 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 make this expansion into narrowband or broadband multiply, so that interference effects may become very small. Work with other systems compared to the same frequency band, Bluetooth frequency hopping faster, shorter packets, which makes Bluetooth technology are 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 factory inspection and acceptance personnel should sign the report of Cell Phone Jammers if Cell Phone Jammers is qualified.