I-Data 812-1x MIO - Manual (Page 20)

ida 812-1x MIO Operator’s Guide
Operation
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If data is sent on the twinax line, the module will enter Twinax
Session mode. If no data is sent via the twinax line within the
specified timeout period, parallel data may be printed. This also
applies if the module is in Twinax Session mode.
NOTE:
Because the printer is being shared between the
parallel port and the host, careful attention should be
paid to the setting up of the PC, so that jobs are not
automatically terminated because the printer is busy.
This problem may be helped by setting the PC timer
"off" by writing "MODE LPT1:,,P" (in case of an LPT1
printer) in DOS.
Use of the DOS PRINT command is recommended.