89Options ListSet On-hook default pathThe On-hook default path option (available on the M3903 and M3904)automatically opens the voice path on either a Headset (connected to the headsetjack) or on Handsfree when you press a Line (DN) Key. After you select On hookdefault path from the Options List menu;From the On hook path menu, use theNavigation Keys to highlight andselect either:orHandsfree selectedorHeadset selectedPress the Done Key to save selection. Press the Quit Key or Options Key to exit.Note: Refer to “Headsets” on page 128 for information on recommended headsettypes for your telephone.Display diagnosticsThe Display diagnostics option tests the functionality of your telephone’s displayscreen and indicator lights. This option also provides information on the firmwarecurrently in use on your M3900 series telephone. After you select Displaydiagnostics from the Options List menu;Use the up or down Navigation Key toscroll through the list and view thechanging display screens.Press the Done Key to return to the Options List menu. Press the Quit Key orOptions Key to exit.Handsfree selectedHeadset selected
