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第一,二篇描述了数据传输信道和调解器设备的一些主要特性,本篇则使你对主要数据源和终端有个入门,并对串行通信和信道入口设备的界面接口装置作一介绍。今天的LSI装置简化了串行比特数据流而只是并行的字符总线的通信界面接口一所以开始了一系列可喜的结果。首先是数据通信中信道的数目可减至最少,从而
Chapters I and II describe some of the key features of data transmission channel and modem devices. This article gives you an introduction to key data sources and terminals, as well as an introduction to interface devices for serial communication and channel entry devices . Today’s LSI devices simplify the serial bit stream and are just a parallel interface to the character bus communication interface, which started a series of promising results. The first is the number of channels in data communications can be reduced to a minimum, and thus