New interfacing options

摘要

What do you do if your PC doesn't have RS-232? Get a USB adapter, oj course. And how about an all-digital military walkie-talkie at pocket-money prices ? Read on... USB REPLACEMENT FOR THE SERIAL PORT. The old fashioned humble serial port is dead, or so the makers of the latest PCs would have us believe. But is it? The serial port, also called the RS232 or COM port, has been a mainstay of computer to computer, modem and terminal communications since the 1960s-and is so standard that everyone must have had some contact with it at some time in their (computer) life.