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ports, port_names - Device (tty and lp) names for serial and parallel ports
Default Serial Ports:
/dev/tty01 (not present on a single-port system)
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 pathname always maps to 1, COMM1, the lowest port number, an icon
for a terminal console, or the only serial port (on a single-port
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 printers, 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 monitor 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 Application 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.
Devices: ace(7), modem(7)
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