Connector - Serial (PC 9)

Also known as EIA/TIA 574

9 PIN D-SUB MALE at the Computer.

(at the Computer)

Pin	Name	Direction	Description
1	CD	Input	Carrier Detect (CF) (V.24 109)
2	RXD	Input	Receive Data (BB) (V.24 104)
3	TXD	Output	Transmit Data (BA) (V.24 103)
4	DTR	Output	Data Terminal Ready (CD) (V.24 108.2)
5	GND	---	System Ground (AB) (V.24 102)
6	DSR	Input	Data Set Ready (CC) (V.24 107)
7	RTS	Output	Request to Send (CA) (V.24 105)
8	CTS	Input	Clear to Send (CB) (V.24 106)
9	RI	Input	Ring Indicator (CE) (V.24 125)

Note: Direction is DTE (Computer) relative DCE (Modem).
Note: RS232 column is RS232 circuit name.
Note: V.24 column is ITU-TSS V.24 circuit name.

Source: HW-Book 2001-06-08
Last modified: 2007-06-27 14:22:58.0
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