HP Color LaserJet Enterprise flow M880 Multifunction Printer series - Manual (Page 102)

Menu item Description
Ring Interval Touch the box beneath the Ring Interval heading to open the keypad. Enter a value for
the ring interval on the keypad, and then touch the OK button. The default setting for
ring interval is 600 ms.
Ring Frequency Touch the box beneath the Ring Frequency heading to open the keypad. Enter a value for
the ring frequency on the keypad, and then touch the OK button. The default setting for
ring frequency is 68 Hz, which detects rings up to 68 Hz.
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