Specifications

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Appendix C: Technical Specifications
YoucanusethiscableforallserialdevicesexceptthosethatdonotneedRTSflowcontrol.
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.
Note: Ifyouareattachinga modemwithmodemsignalsandRTS/CTSflowcontrol,you
must use the /dev/ttyf* command devices in the configuration files. For more detailed
information, see theserial manpage. To accessthisman page, fromthe Toolchest, choose
Help > InfoSearch > Man pages. Or place the cursor in the console window and type
man serial
Table C-11 PC Modem Cable Pinout
Signal
Description
Pin Number
DB9 Connector (Female)
Pin Number
DB-25 Connector (Male)
DCD 1 8
RXD 2 3
TXD 3 2
DTR 4 20
GND 5 7
DSR 6 6
RTS 7 4
CTS 8 5
RI 9 22