User`s guide

67
9-Pin Serial Port (J4) Pin Assignment
25-Pin Serial Port (J3) Pin Assignment
22 - RI, Ring Indicator
20 - DTR, Data Terminal Ready
Mainboard Specifications
1 - DCD, Data Carrier Detect
2 - RXD, Receive Data
4 - DTR, Data Terminal Ready
3 - TXD, Transmit Data
5 - GND, Ground
6 - DSR, Data Set Ready
7 - RTS, Request to Send
8 - CTS, Clear To Send
9 - RI, Ring Indicator
8 - DCD, Data Carrier Ready
6 - DSR, Data Set Ready
5 - CTS, Clear to Send
4 - RTS, Request to Send
3 - RXD, Receive Data
2 - TXD, Transmit Data
7 - GND, Ground