Piedinature - Pinouts
Serial (PC 9 Pin)

(9 PIN D-SUB MALE at the Computer)

(10 PIN internal connector on maiboard)

Pin	Name	Dir	Description
1	CD	IN	Carrier Detect
2	RXD	IN	Receive Data
3	TXD	OUT	Transmit Data
4	DTR	OUT	Data Terminal Ready
5	GND	------	System Ground
6	DSR	IN	Data Set Ready
7	RTS	OUT	Request to Send
8	CTS	IN	Clear to Send
9	RI	IN	Ring Indicator

Note: Direction is DTE (Computer) relative DCE (Modem).

Piedinature - PinoutsSerial (PC 9 Pin)