描述： Enables RS-232 UNIX? and similar systems to communicate over two unconditioned twisted pairs. Carrier-sense handshaking detects carrier from the RS-232 terminal. Built-in surge protection available. No AC power or batteries needed. 规格： The asynchronous Carrier Sense Mini Driver–A makes it possible for RS-232 UNIX? and similar systems to communicate over two unconditioned twisted-pair cables. That's because it features carrier sense handshaking, which detects the presence of a carrier (RTS) on the line. And that comes in handy in applications where the host must "see" a carrier in order to send a log-on screen to a terminal.
