User`s guide

Standard Print Servers
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46 TCP/IP AXEL Platine Terminal
The printer must be attached to the slave part of the pseudo-terminal. For
example, if the printer is attached to /dev/ttypf, then /dev/ptypf is used
with the rcmd command.
Note: the rcmd command can be added within a boot script which should be
placed in the /etc/rc2.d directory.