The earliest human history, as now is the mobile phone means "wireless", such as the use of the beacon to transmit information to the fire, we usually think this is the first way of passing messages. Indeed not, in our country and Africa in ancient original phone cable Obo find recycling electronics, drum transfer is believed to be the earliest and most convenient way to African drums with special logs may sound transmission to three four thousand meters, and through " drums relay "and special" drumming language "in a very short time the news accurately to another tribe 50 km away. In fact, whether drumming, flames, semaphore flag colors dancing by [], or today's mobile phones, long-distance transmission of messages to achieve high recovery of the original phone cable, you need to pass the layers of a relay station, the message to the destination ground. However, since that time humans have not found power, so in order to achieve long-range flow quickly deliver messages only wait. Revolutionary change in the history of mankind phone, took place from the electricity as an information carrier. February 17, 1753, in the "Scotsman" magazine published an anonymous letter. In this letter, the authors proposed to use the phone's current bold vision. Although not very mature at the time, and the lack of application of the promotion of the economic environment, kept people see the rays of dawn telecommunications era. In 1793, Charles Perry brothers in France between Paris and Lille erected a 230 kilometer-long relay bracket-style way of conveying line information. It is said that the two brothers are the first to use "telegraph" the word of man. Wireless Media: wireless medium in use can be divided into the visible light, microwave, ultraviolet, infrared and other bands. Although there is some non-licensed spectrum phone cable can be used to recycle, but most wireless bands are needed even after authorization before they can be used to purchase. For example, in the third-generation mobile phone network construction 0 ago, many network operators to spend billions of dollars to buy a license to operate, that is to buy the right to use the corresponding band, and eventually these costs are to be borne by the user a. Fiber: Fiber is also a wired medium, which can provide up to terahertz level of bandwidth and very low error rate phone cable recycling company, but the drawback is the complexity of the installation, you need professional staff and specialized equipment. 0 before, mainly used in fiber optic backbone network. Table 2'1 gives a different use of the electromagnetic spectrum of mobile phone technology, as well as the electromagnetic spectrum corresponding to different transmission media and typical application phone cable recycling company _ Obo Electronics (certified) _ Tianjin phone cable recovered from Shenzhen Obo Electronic Technology Limited. Shenzhen Electronic Technology Co., Obo (www.aobodz.com) is Shenzhen, the other leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Obo electronic leadership with the staff warmly welcome all inquiries negotiations to create a better future for electronic Obo.