Details
The RS232 Interface tester can be connected across any serial port (at a SUB-D9
interface) to visually monitor the outputs on LED and set any input signals
through switches. The interface tester is installed at an existing serial
connection and offers easy testing as well as a loop-back connection test.
It has a header for RS232 interface, providing easy access
to all interface pins, allowing you to perform tests (e.g. with a multimeter
test set, oscilloscope, etc.) during runtime.