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Serial Cable DB-25 Female to DB-25 Male Pin-outs
Cable Pin-Out Signals
The signals for the cable pin-outs are as follows:
Appendix D: Working with Coaxial Cable
Coaxial cable is a common type of cable used for network data transmission. In coaxial cable, an
insulated wire runs through the middle of the cable and a second wire, called the shield, surrounds
the insulation of the inner wire like a sheath. The outer insulation jacket wraps around the second
wire.
B-9 Female DB-9 Male
2___________2
3___________3
4___________20
5___________5
6___________6
7___________7
8___________8
20__________4
22__________22
DB-9 DB-25 DB-25 DB-9
Male Male Female Female
Pin Pin Signal Pin Pin Signal Description
5 7 GND 7 5 Protective Ground
3 2 TXD 2 3 Transmitted Date
2 3 RXD 3 2 Received Data
7 4 RTS 4 7 Request to Send
85CTS58Clear to Send
4 20 DTR 20 4 Data Term Ready
6 6 DSR 6 6 Data Set Ready
1 8 RLSD 8 1 Received Line Signal
Detector
9 22 RI 22 9 Ring Indicator