Xerox M20/M20i manual Up to 5 digits, Low, High, Off Print

Auto Reduction	On	Use to activate the machine performing an	Fax
		automatic reduction for over-sized fax jobs.
	Off	Use to de-activate the automatic reduction.
		Over-sized jobs are printed on two pages.
Prefix Dial	Up to 5 digits	The number entered will be added to the
		beginning of each fax sent.
Auto Report	On	Use to enable a report listing details about the
		previous 50 communication operations.
	Off
ECM Mode	On	Use to switch on ECM for all transmissions.
		Transmission time may be increased when
		ECM is enabled.
	Off	Use to switch off ECM.
Redials	[0 - 13]	Use to set the number of redial attempts.
Ring to Answer	[1 - 7]	Use to set the number of rings before
		answering.
Redial Term	[1 - 15]	Use to set the number of minutes between
		redial attempts.
Ringer	Off	Use to set the ringer volume.
	Low
	Med
	High
Junk Fax Setup	On	Use to restrict receipt of junk mail by only
		allowing faxes to be received from remote
	Off
		machines registered on your machine.
Secure Receive	On	Use to set the default option for receiving
		secure faxes.
	Off
	Print
Fax Auto Tray	Tray 1	Selects the default paper tray for fax jobs.
	Tray 1 & Tray 2
	All

Xerox CopyCentre C20, WorkCentre M20 and WorkCentre M20i User Guide Page 6-23