Communication Methods (Unidirectional and Bidirectional Printing)
There are two fax communication methods: unidirectional printing and bidirectional printing. Which method is used depends on the type of fax, the connection configuration, and the settings made when registering the fax from [System Preferences].
How to Determine the Communication Method
Whether the printer you are using is connected by bidirectional printing or unidirectional printing can be verified by clicking [Printer info] in the [Special Features] preferences pane in the [Print] dialog box. For details on how to display the [Print] dialog box, see "
Faxing a Document."
If [Printer Info] is not displayed, the printer is connected by unidirectional printing.
Communication Methods (Unidirectional and Bidirectional Printing)
Bidirectional Printing
Communication is possible in both directions between the computer and the fax.
Unidirectional Printing
Data can be sent only from the computer to the fax.
The following functions that require bidirectional communication are not available (for details, refer to the Online Help):
Acquiring information regarding options installed in the fax device etc. from the fax side
NOTE
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To use the options set in the printer you are using, you must set the options at the computer. For details about setting the options, see " Unidirectional Printing."
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Using the Canon CUPS Faxmonitor.
Verifying the department ID and PIN.