As mentioned, the RS232 interface was designed to connect a modem (DCE) to a computer (DTE). To make a direct (DTE-DTE) link, a null modem cable (or null modem adapter) must normally be used. This is sometimes called a crossover cable, since pin 2 at one end is wired to pin 3 at the other, etc.
Lecture 14: Point-to-Point Data Links | Copyright © 2004 P.Scott, La Trobe University Bendigo. |