JARLTECH 8010T Operation Manual page 40

Specifications
#1: +5V DC Power
#2: RX
#3: TX
#5: Ground
#1: +12V DC Power
#3: RX
#5: Ground
#1: Keyboard data
#3: +5 V
#4: Ground
#5: Keyboard clock
#7: RTS
#8: CTS
#9: +12V DC power
#6: RTS
#9: +5V DC Power