RS232 "Tri-State" Breakout Box / CCITT V.24 Interface Tester
The Model 700 EIA RS-232 Interface Analyzer is a diagnostic tool designed for use at the Standard EIA RS-232 or CCITT V.24 data interface of modems, multiplexers, terminals, and computers. It is simply inserted in series between the DTE (Data Terminal Equipment) and the DCE (Data Communication Equipment) to provide access to and monitoring of all data, timing, and control signals. Features Tri-State LED's that display Red, Green & Off to indicate signal status. This determines polarity through colors of the LEDs.