The RS232 connector was initially developed to use 25 pins. In this DB25 connector pin configuration, provisions were provided for a secondary serial RS232 communication channel. However, practically only one serial communication channel with handshaking is present. There were hardly a few computers manufactured...

RS 232 stands for Recommended standard number 232. This interface is an age old, and yet it is being used for interconnecting DTE and DCE. It is also one of the maximum used standards for data exchange. The simplicity of configuration and huge capability...