卫星(a)总线型(b)卫星和无线电式图6.6广播式网络拓扑结构
图6. 6 广播式网络拓扑结构 卫星 (a)总线型 (b)卫星和无线电式
内芯屏蔽绝缘材料塑料外层图6.7同轴电缆结构图
图6.7 同轴电缆结构图
电信号光信号光信号光源放大器驱动器光检测光红)图6.8光纤传输
图6. 8 光纤传输
21235Tele-softw-Tele-Tele-Tele-End userareChannelscomputerprocessorsprocessors&ComputerMedia
1 2 3 4 5 End user Tele- Tele- Telecomputer processors Channels processors & Media Computer 2 Telesoftware
五种基本部件1. Terminals2.Tele- processors Modem, multiplexes & front-endprocessors, Digital to Analog or back, Code & decodedata, Control the accuracy & efficiency.3. Telecommunication channels & media Copper wires,Coaxial cable, Fiber optic cables, microwave's system,Communications satellites.4.ComputersMainframe,→ Host computersMinicomputer Front end processorsMicrocomputerNetwork server5. Tele-control softwareMonitors (Mainframe)Network operating systems (Micro)Communication package (Micro)
五种基本部件 1. Terminals 2. Tele- processors Modem, multiplexes & front-end processors, Digital to Analog or back, Code & decode data, Control the accuracy & efficiency. 3. Telecommunication channels & media Copper wires, Coaxial cable, Fiber optic cables, microwave’s system, Communications satellites. 4. Computers Mainframe, Host computers Minicomputer Front end processors Microcomputer Network server 5. Tele-control software Monitors (Mainframe) Network operating systems (Micro) Communication package (Micro)