port_names man page on OSF1

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ports(7)							      ports(7)

NAME
       ports,  port_names  - Device (tty and lp) names for serial and parallel
       ports

SYNOPSIS
       Default Serial Ports: /dev/tty00

       /dev/tty01 (not present on a single-port system)

       Parallel Port: /dev/lp0

DESCRIPTION
       AlphaStation and AlphaServer systems provide one or  two	 9-pin	serial
       communication  ports.  These ports are usually labelled 1 (COMM1) and 2
       (COMM2), but they may be	 identified  by	 different  icons.  Using  the
       appropriate  serial  cable  and	terminator,  you  can connect a serial
       printer, external modem, or character-cell terminal to a	 serial	 port.
       Most  AlphaStation  and	AlphaServer  systems also provide one parallel
       port, for use with a parallel printer.

       When you add a device to your system,  the  installation	 documentation
       may  instruct you to map the device pathname to the port. These devices
       are located in the /dev directory.

       For serial-line ports, the two default device pathnames are: This path‐
       name  always  maps  to  1, COMM1, the lowest port number, an icon for a
       terminal console, or the only serial port (on  a	 single-port  system).
       This  pathname  always maps to 2, COMM2, the next numbered port, or (if
       one serial port is labeled with an icon for  a  terminal	 console)  the
       remaining serial port.

       If  your system hardware has been extended to include additional serial
       ports, the pathnames /dev/tty02, /dev/tty03, and so forth, may also  be
       available  to  you.  However,  most  systems  have  only /dev/tty00 and
       /dev/tty01 as the device pathnames for serial ports.

       The one parallel port on an AlphaStation or AlphaServer may be  labeled
       with  the word printer or a printer icon. On some systems, the parallel
       port may not be labeled.	 The device pathname for the parallel port  is
       /dev/lp0.  Currently, Tru64 UNIX does not fully support parallel print‐
       ers, so fewer devices are connected to this port as compared to	serial
       ports.

       If  you	are  connecting	 a terminal console to your system, it must be
       connected to the serial port mapped to  /dev/tty00.  For	 other	serial
       devices,	 it  does  not matter which of the serial ports you choose for
       the connection. For example, suppose you are setting up a  system  that
       has two serial ports, labeled 1 and 2.  You intend to use a serial-line
       terminal rather than a workstation monitor as the  system  console  and
       also want to connect a serial-line printer to the system. In this case,
       you must connect the terminal to the port labeled 1  (with  the	device
       pathname	 /dev/tty00).  Therefore,  you must connect the printer to the
       remaining port labeled 2 (with the device pathname /dev/tty01).

       If, for the same type of system, you intend to use a workstation	 moni‐
       tor as the system console, it does not matter which serial port you use
       for a serial-line printer or modem. In other words, you can connect the
       printer	to  either  port  1 (with pathname /dev/tty00) or port 2 (with
       pathname /dev/tty01).  When prompted to enter a /dev/tty** pathname  by
       the lprsetup script or the Print configuration tool in the CDE Applica‐
       tion Manager, you would specify /dev/tty00 if you connected the printer
       to port 1 or /dev/tty01 if you connected the printer to port 2.

       See the System Administration manual for more information on setting up
       consoles (including remote consoles) and	 printers.  See	 the  modem(7)
       reference page for more information on setting up modems.

SEE ALSO
       Commands: lprsetup(8)

       Devices: ace(7), modem(7)

       System Administration

								      ports(7)
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