通信名词DCE与DTE

引 http://203.208.39.132/search?q=cache:J29EDmtNn2cJ:www.cnblogs.com/answer/archive/2007/07/13/816968.html+dte-ta+dce&cd=6&hl=zh-CN&ct=clnk&gl=cn&client=aff-cs-worldbrowser&st_usg=ALhdy29_t9XWLUE-Z9rd7vpHOmdYGUEJSA
Serial Communication via RS232 Port ：
Devices, which use serial cables for their communication, are split into two categories. These are DCE (Data Communications Equipment) and DTE (Data Terminal Equipment.) Data Communications Equipments are devices such as your modem, TA adapter, plotter etc while Data Terminal Equipment is your Computer or Terminal. A typical Data Terminal Device is a computer and a typical Data Communications Device is a Modem. Often people will talk about DTE to DCE or DCE to DCE speeds. DTE to DCE is the speed between your modem and computer, sometimes referred to as your terminal speed. This should run at faster speeds than the DCE to DCE speed. DCE to DCE is the link between modems, sometimes called the line speed.
一般情况下，PC、路由器作为 DTE设备，Modem、复用器、CSU/DSU作为 DCE设备。异步串口一般外接Modem或 TA（Terminal Adapter，终端适配器）用作拨号口。