... FBB Fiber BackBone 光纤干线 fiber optic networks backbone 光纤网络干骨 optical fiber backbone test equipment 光纤强度测试器 ...
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光纤已是长途干线的首选传输媒质。
Optic fiber is now the preferred transmission medium for long-haul trunks.
光纤传输也已成为当前通信，特别是干线通信的主要手段。
Optical fiber transmission has also become the major means of communication, particularly in the trunk communication network.
在系统主干线通道上采用光纤通信方式，对于分支通信采用屏蔽双绞线以RS-485方式通信，并对网络体系结构作了详细的描述。
Optical fiber communication mode is adopted in main channels, RS-485 communication mode using shielding twisted pair lines is employed in branch channels, and detailed descri…
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