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术语 fiber optic modem
释义 fiber optic modem
光纤调制解调器
A device with an RS232, RS422, or CCITT V.35 interface, which propagates control functions in both directions to provide terminal to central processing unit link up. Sync speeds are 1.2k to 115 k bps. In addition, a typical FO modem has a true T1 interface via a barrier strip that provides 4wire termination to the T1 link. A high speed fiber optic digital communications link features up to 20M bps NRZ data transmission rate. Equipment electrical isolation, ground loop avoidance, data transmission security, and TTl input/output compatibility are other features.
一种采用RS232,RS422或CCITT V.35接口的设备,能双向传输控制功能,从而将终端和 中央处理单元连接起来,其同步速率是1.2千到115千比特/秒。典型的光纤调制解调器具有真 正的T1接口,通过带状隔离线把4线终端连到T1链路上。高速光纤数字通信链路具有高达20兆 比特/秒的不归零制数据传输速率、设备的电绝缘性、不需要接地回路、数据传输安全性及 TTL输入输出兼容性等特点。
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