Optical fiber leased line access: Anti-interference and easy upgrade

Optical Fiber Communication is a communication mode in which various electrical signals are modulated by optical fibers. Optical Fiber Communication is different from wired communication. The latter uses metal media to transmit signals, while optical fiber communication uses transparent optical fiber to transmit light waves. Although both light and electricity are electromagnetic waves, the frequency range varies greatly.

Generally, the maximum usage frequency of the communication cable is about 9 ~ 24 MHz 10 ^ 6Hz), optical fiber working frequency between 10 ^ 14-10 ^ 15Hz.

Optical fiber leased line access explanation:

(1) connect the client's optical fiber Modem using a common router such as Huawei 2621;

(2) the client's optical fiber Modem is directly connected to the optical fiber Modem of the metro node closest to the client through the optical fiber;

(3) connect to the Internet through the ISP's backbone network egress.

Main advantages of optical fiber communication:

(1) large capacity. The optical fiber working frequency is 8-9 orders of magnitude higher than the current working frequency of the cable, so the capacity developed is very large.

(2) Small attenuation. The attenuation of optical fiber per kilometer is more than an order of magnitude lower than that of the current communication coaxial cable with the largest capacity.

(3) small size, light weight. It is also conducive to construction and transportation.

(4) good anti-interference performance. The optical fiber is not subject to strong electrical interference, electrical signal interference, and lightning interference, so it has strong anti-electromagnetic pulse capability and good confidentiality.

⑸ Saves non-ferrous metals. Generally, communication cables consume a large amount of copper, lead, aluminum, and other non-ferrous metals. Optical fiber itself is non-metallic, and the development of optical fiber communication will save a lot of non-ferrous metals for the country.

⑹ Resizing is convenient. A standard fiber-optic leased line with a bandwidth of 2 Mbps can be easily upgraded to 4 M, 10 M, and 20 M, up to 100 Mbps, without any device replacement.

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