USB is a new PC interconnection protocol and has many advantages, It is a tendency that USB replaces the RS232 as computer and peripheral standard interface.
USB作为一种新的PC机互连协议，因其诸多优点，有逐渐取代RS 232串口，成为计算机和外设标准接口之趋势。
RS232 interface which is a standard serial interface mode has been widely used in computer communication.
RS232接口在计算机通讯中应用非常广泛，成为一种标准的串口通讯方式。
The standard Bus Couplers have an RS232 interface at the bottom of the front face.
标准总线耦合器具有在正面底部的RS232接口。
The standard Bus Couplers have an RS232 interface at the bottom of the front face.
标准总线耦合器具有在正面底部的RS232接口。
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