The characteristics of optical fiber communication
Large capacity optical fiber communication with the communication, the attenuation is small, not afraid of lightning, anti-electromagnetic interference, corrosion resistance, Cnc machining confidentiality, reliability, and easy installation, but the relatively high investment costs, especially for inner city buried cable lines fiber laying, construction costs will be greater.
Optical fiber communication implementations in distribution networks
Optical fiber communications network formation is very flexible and can frame into a star, chain, tree, mesh, single fiber network,Cnc machining dual-fiber network, ring multi-branch, multi-ring intersection, tangent, and other multi-ring topology network.
According to the characteristics of distribution automation systems, fiber optic ring net usually made up of network and computer local area network connection, data sharing.
She Ji practical engineering, the fully take into account the special network topology power structure of communication complexity, SDH transmission systems can use up to 126 E1 (2M I) Quan cross Lian Jie He pairs the main branch of halo + more than the design of Si Xiang Guang. The basic framework of 1 to 3 SDH/STM-1 dual-fiber self-healing intersect or tangent, and when necessary, can change the way light card online upgrade SDH/STM-4. If the Bureau of the network control center is located in the geographical center of the LAN, the proposed design for the tangent to the ring to dispatch center as the cutoff point; if the Board deviated from the network control center LAN geographical center of the proposed design for the intersection ring,Cnc machining because not dispatch center intersection, in order to reliably between the adapter ring, the ring at least two points intersect each other to protect routing.