HP LaserJet Enterprise M4555 MFP series - Manual (Page 220)

Set redial-on-no-answer
The redial-on-no-answer setting selects the number of times the fax accessory redials if the number
dialed does not answer. The number of retries is either 0 to 1 (used in the U.S.) or 0 to 2, depending
on the country/region setting. The interval between retries is set by the redial interval setting.
1. From the Home screen, scroll to and touch the Administration button.
2. Open the following menus:
● Fax Settings
● Fax Send Settings
● Fax Send Setup
● Fax Dialing Settings
3. Touch the Redial On No Answer text box to display the keypad.
4. Enter a value (0-2, default is 0) and then touch the OK button.
5. Touch the Save button.
Set the dial tone detection
The detect dial tone setting determines whether the fax checks for a dial tone before sending a fax.
1. From the Home screen, scroll to and touch the Administration button.
2. Open the following menus:
● Fax Settings
● Fax Send Settings
● Fax Send Setup
● Fax Dialing Settings
3. Touch the Detect Dial Tone setting; a checkmark appears next to the Detect Dial Tone setting when
selected. The default setting is unchecked (disabled).
4. Touch the Save button to enable dial tone detection.
Set a dialing prefix (if required)
The dialing prefix setting allows you to enter a prefix number (such as a "9" to access an outside line)
when dialing. This prefix number is automatically added to all phone numbers when dialed.
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