Enterprise IP Phone Using the Basic Call Functions- 16 -show the Fixed Type: By Date or By Week. And the daylight saving time isunchangeable, unless to update the AutoDST.xml via auto provision.Note:By default the time zone is +8 China(Beijing), Daylight Saving Time is Automatic.Keypad LockYou can lock the keypad of your phone when you are temporarily not using it. Thisfunction helps you to protect your phone from unauthorized use. You can lock thefollowing specific keys:Menu Key: The Menu hot keys can not be used until unlocked. You can not accessthe menu of the phone.Function Keys: The hard function keys (MESSAGE, FORWARD, RD, OK, X, navigationKeys, Volume adjustment button and line keys) can not be used untilunlocked. You can not access the hot keys such as Conf, Hold, Mute,Tran, History, Dir, DND, etc either.All Keys: All of the keys can not be used until unlocked. You can only use thephone to answer the incoming calls.Lock&Answer: You can only use the phone to answer the incoming calls(But can nothung up the call by your party). Or enter the menu pages to do someconfigurations.To enable keypad lock via Phone interface: