Cable and Ethernet Specifications B-3
Male-to-Male Straight-Through RS-232 Cable
Male-to-Male Straight-Through RS-232 Cable
Table B-2 gives pinout information for a male-to-male straight-through RS-232 cable.
Pins not listed have no connection.
Ta b l e B - 2 Straight-through Cable Pinout
PortMaster
Serial Port (C0)
Te r m in a l
Serial Port
DB-25
(DTE) Signal Definition
Direction to
or from the
PortMaster
DB-25
(DCE)
Pin
DB-9
(DCE)
Pin Signal
2 TXD Transmit Data Output 2 3 TXD
3RXDReceive Data Input 32RXD
4 RTS Request to Send Output 4 7 RTS
5 CTS Clear to Send Input 5 8 CTS
6 DSR Data Set Ready 6 6 DSR
7 GND Signal Ground 7 5 GND
8 DCD Data Carrier Detect Input 8 1 DCD
20 DTR Data Terminal
Ready
Output 20 4 DTR
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