Serial Cables and Converters
007-4486-001 203
Note: For a 3-wire cable and no hardware flow control modem, you must use the
/dev/ttyd* command devices in the configuration files. For more detailed information,
see the serial man page. To see the man page, from the Toolchest, select Help >
InfoSearch > Man pages. Or place the cursor in the console window and type: man
serial
PC Modem Serial Cable
Use a full-handshake (includes RTS and CTS) PC modem serial cable for a modem with
RTS/CTS flow control. Table A-13 shows the cable connector pin assignments for this
cable.
You can use this cable for all serial devices except those that do not need RTS flow control.
Devices like serial printers and dumb terminals that do not need RTS flow control can
still be used with this cable, provided that a null modem adapter is added to one end of
the cable. You can purchase the full-handshake PC modem serial cable from Silicon
Graphics or your local service provider.
Table A-12 Cable Pinout Assignments for Printer/Dumb Terminal Serial Cable
Signal
Description
Pin Number
DB9 Connector (Female)
Pin Number
DB-25 Connector (Male)
1 NOT CONNECTED
RXD 2 2
TXD 3 3
4 NOT CONNECTED
GND 5 7
6 NOT CONNECTED
7 NOT CONNECTED
8 NOT CONNECTED
9 NOT CONNECTED
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