This cable is for replacing the old DB9 female to 2.5mm audio cable as DB9 COM port are faded in notebook PC nowadays.
Standard pinout: Tip-RXD,Ring-TXD,Sleeve-GND. 2.5mm Tip - DB9#2 , 2.5mm Ring - DB9#3, 2.5mm Sleeve- DB9#5
USB RS232 to Stereo 2.5mm Plug (Shielded) Data CableCable
length:1.8m
Fully compatible replacement cable,Tested to perform as the original APC 940 series.etc.
