User`s manual

20 Connectors & Jumpers

Serial Port Connectors (COM3/4)

*Note: See “Jumper Settings” on page 27 for RI/+5V/+12V selection.

Pin # Signal Functions

1 DCD Data Carrier Detect

2 TXD Transmit Data

3 GND Ground

4 RTS Request to Send

5 RI_Power Ring Indicate, Power *

6 RXD Receive Data

7 DTR Data Terminal Ready

8 DSR Data Set Ready

9 CTS Clear to Send

10 NC Key