Connect this easy to use RS232 data link tester in between your RS232 data cable, and visually see that data is physically transmitted and received via the RS232 cable.
- No power required.
- Standard RS232 DTE & DCE interface
- DB9 Male to DB9 Female (Dsub 9 pins).
- Easy to see 2 color LED indicators.
Green LED is TTL out 1,
Red LED is TTL out 0.