More than half of 2017 has passed, and China's mobile communication business has also achieved good development. Recently, the Ministry of Industry and Information Technology released the communication operation in September 2017, detailing the current situation of China's communication capabilities.
In terms of mobile communications, the pace of infrastructure construction has accelerated and the scale of mobile base stations has reached a new high. This year, a total of 447,000 mobile communication base stations have been added, a total of 6.041 million, of which the total number of 3G/4G base stations reached 4.471 million, accounting for 74%.
In terms of fixed-line broadband, the optical broadband network accelerates the construction of “light into copperâ€. At the end of September, the number of Internet broadband access ports reached 762 million, a year-on-year increase of 11.3%, a net increase of 49.09 million from the end of the previous year. The basic telecommunications companies continued to accelerate the “light into the copper retreat†process. The xDSL port decreased by 12.65 million compared with the end of the previous year, and the total number dropped to 26.22 million, accounting for 3.4% from 5.4% at the end of the previous year. The number of fiber access (FTTH/0) ports reached 630 million, a net increase of 92.3 million from the end of the previous year, and the proportion increased from 75.6% at the end of the previous year to 82.7%.
In terms of transmission network, the length of optical cable lines has maintained a relatively fast growth, and the proportion of access network cables has reached 64.3%. From January to September, the country built 5.64 million kilometers of optical cable lines, and the total length of optical cable lines reached 36.06 million kilometers, a year-on-year increase of 25%, maintaining a relatively fast growth trend. Access network cable, local network trunk cable and long-distance cable line accounted for 64.3%, 32.9% and 2.8% respectively.
KNB1-100 Miniature Circuit Breaker
KNB1-100 Mini Circuit breakers, also named as the air switch which have a short for arc extinguishing device. It is a switch role, and also is a automatic protection of low-voltage electrical distribution. Its role is equivalent to the combination of switch. Fuse. Thermal Relay and other electrical components. It mainly used for short circuit and overload protection. Generally, According to the poles, mini Circuit breaker can be divided into 1P , 1P+N , 2P, 3P and 4P.
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