The Datatest II is a universal RS232 tester that can test nearly all parameters of an RS232 link. The unit features line breakout and open/close functions, preset automatic tests and an alphanumeric LCD display.
The keypad is stamped Datatest II, BUT it is actually a Datatest II Plus.
Power adapter NOT included.
We only checked to see if it passed the self-test. No other testing was done.