Terms you should know41Interrupted dial toneA broken or pulsed dial tone that sounds when you access somefeatures on your telephone.Message/InboxA fixed key on your IP Phone 1140E that connects to your voicemessaging system when the key is pressed.Navigation keysKeys used to scroll through menus and lists appearing on theLCD display screen.Off-hookAny line selected to make a call or receive an incoming call.The term off-hook is applied whether (a) the end user lifts up thehandset, (b) the end user presses a line key, (c) the call isautomatically answered at the telephone, or (d) a line isautomatically selected for an outgoing call.Paging toneA special tone (two beeps followed by dial tone) that soundswhen you use the Radio Paging feature.Ringback/ring toneA sound indicating that a call you have made is ringing at itsdestination.Services keyA fixed key used to access options such as Telephone Options,Password Admin, Virtual Office Login, Virtual Office Logout, TestLocal Mode, and Resume Normal Mode.Shared Directory NumberA DN (extension) that is shared by two or more persons.