Nine-Pin-to-25 Pin
Serial Cable Specifications
DB9
Pin #
Pin Name
DB25
Pin #
1
Carrier Detect (CD)
8
2
Receive Data (RD
3
3
Send Data (SD)
2
4
Data Terminal Ready (DTR)
20
5
Signal Ground (GND)
7
6
Data Set Ready (DSR)
6
7
Request to Send (RTS)
4
8
Clear to Send (CTS)
5
9
Ring Indicator (RI)
22
--
Shield
1
Macintosh Serial Cable
Pin Specifications
8-Pin DIN
Pin #
Pin Name
DB25
Pin #
1
Data Terminal
Ready (DTR)
20, 4
2
Clear to Send
(CTS)
5
3
Send Data (SD)
2
4,8
Signal Ground
(GND)
7
5
Receive Data
(RD)
3
7
Data Carrier
Detect (DCD)
8