
UserGuidefortheSIP-T21P IP Phone 
viii 
LocalDirectory................................................................................................................28 
Blacklist............................................................................................................................38 
Remote PhoneBook........................................................................................................40 
CallHistoryManagement................................................................................................42 
SystemCustomizations......................................................................................................44 
LogoCustomization........................................................................................................44 
Headset Use....................................................................................................................45 
DSS Keys ..........................................................................................................................46 
Account Management...................................................................................................54 
DialPlan...........................................................................................................................55 
EmergencyNumber........................................................................................................61 
Live Dialpad....................................................................................................................62 
Hotline..............................................................................................................................63 
Basic Call Features................................................................. 65 
PlacingCalls.......................................................................................................................65 
Answering Calls .................................................................................................................67 
Ending Calls........................................................................................................................68 
Redialing Numbers............................................................................................................69 
Recent Call InDialing........................................................................................................69 
AutoAnswer.......................................................................................................................70 
AutoRedial..........................................................................................................................71 
CallCompletion.................................................................................................................72 
CallReturn...........................................................................................................................73 
CallMute.............................................................................................................................73 
CallHold/Resume...............................................................................................................74 
Do NotDisturb (DND)........................................................................................................75 
CallForward.......................................................................................................................78 
CallTransfer........................................................................................................................84 
CallWaiting........................................................................................................................86 
Conference.........................................................................................................................86 
LocalConference............................................................................................................87 
NetworkConference......................................................................................................87 
CallPark..............................................................................................................................89 
CallPickup..........................................................................................................................90 
AnonymousCall.................................................................................................................95 
AnonymousCallRejection................................................................................................96 
Advanced Phone Features..................................................... 97 
BusyLampField (BLF).......................................................................................................97 
CallRecording....................................................................................................................99 
Hot Desking......................................................................................................................101 
Intercom............................................................................................................................103