Apple LaserWriter 12/640 PS - Manual (Page 96)

Changing the communication settings
The LaserWriter 12/640 PS default communication setting for the TCP/IP
interface is PostScript. If the printer is to be used for PostScript and PCL5
(text) files, you must change the communication setting to AutoSelect, which
turns on automatic language sensing. Automatic language sensing allows the
printer to receive information over the network and determine which page-
description language is required.
Use the printer utility (Mac OS or Windows) to change the communication
setting to AutoSelect. If there are no Mac OS–based computers or
Windows-based computers on your network, you can download a file to the
printer that changes the communication setting to AutoSelect.
Set up your printer for UNIX users as described in this chapter before
changing the communication setting.
1 Set the communication switch on the printer to the Normal (in) position.
2 Using a text editor, create a file with the following contents:
%!PS
(%LPR_NV%) <> setdevparams
3 Download the file to the printer.
For example:
lpr filename
4 Turn the printer off and back on again.
5 Examine the startup page to make sure the TCP/IP port is set to AutoSelect.
To restore the TCP/IP interface to PostScript:
1 Set the communication switch on the printer to the Reset (out) position.
2 Turn the printer off and back on again.
3 Set the communication switch on the printer to the Normal (in) position.
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