Black Box DB9 PockeTester - network tester

Attach the PockeTester to any RS-232 DB9 interface. A quick look at the LEDs tells you the status of each line: mark, space, or no signal. All nine pins are wired straight through for accurate testing. Check system status instantly from anywhere in the room. The large red and green LEDs have high color intensity and a wide viewing angle, making them easy to read. The black background of the molded case provides a good contrast to the LEDs for even better visibility. In fact, you can even infer data bias from the intensity of the color.