术语 | fiber optic modem |
释义 | fiber optic modem 光纤调制解调器 A device with an RS232, RS422, 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 4wire 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RS232,RS422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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