Serial (RS232) modem cable (DB9-DB15). Pinout and signals for building a serial (RS232) modem cable

This cable should be used to connect an internal 14.4kbps Speedster modem to a computer.

D9 pin D-SUB female to the PC
DB9 pin D-SUB female to the PC
DB15 pin D-SUB male to the modem
DB15 pin D-SUB female to the modem

  9 pin 15 pin Direction
Carrier Detect
1
11
«—
Receive Data
2
13
«—
Transmit Data
3
12
—»
Data Terminal Ready
4
10
—»
System Ground
5
1+8+15
Data Set Ready
6
3
«—
Request to Send
7
4
—»
Clear to Send
8
5
«—
Ring Indicator
9
6
«—