User Guide for the SIP-T20P/SIP-T20 IP Phone 
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Keypad Lock.................................................................................................................... 21 
Audio Settings .................................................................................................................... 24 
Volume ............................................................................................................................. 24 
Ring Tones ........................................................................................................................ 24 
Contact Management....................................................................................................... 26 
Local Directory ................................................................................................................ 26 
Blacklist ............................................................................................................................ 32 
Call History Management ................................................................................................ 33 
System Customizations...................................................................................................... 34 
Logo Customization ........................................................................................................ 34 
Headset Use.................................................................................................................... 35 
DSS Keys .......................................................................................................................... 37 
Account Management ................................................................................................... 43 
Dial Plan ........................................................................................................................... 44 
Emergency Number........................................................................................................ 50 
Live Dialpad .................................................................................................................... 51 
Hotline .............................................................................................................................. 52 
Basic Call Features................................................................. 53 
Placing Calls ....................................................................................................................... 53 
Answering Calls ................................................................................................................. 55 
Ending Calls........................................................................................................................ 56 
Redialing Numbers ............................................................................................................ 57 
Auto Answer ....................................................................................................................... 57 
Auto Redial.......................................................................................................................... 58 
Call Completion ................................................................................................................. 59 
Call Return........................................................................................................................... 60 
Call Mute............................................................................................................................. 60 
Call Hold/Resume............................................................................................................... 60 
Do Not Disturb (DND) ........................................................................................................ 61 
Call Forward ....................................................................................................................... 64 
Call Transfer ........................................................................................................................ 69 
Call Waiting ........................................................................................................................ 70 
Conference ......................................................................................................................... 70 
Local Conference............................................................................................................ 71 
Network Conference ...................................................................................................... 71 
Call Park .............................................................................................................................. 73 
Call Pickup .......................................................................................................................... 74 
Anonymous Call ................................................................................................................. 75 
Anonymous Call Rejection ................................................................................................ 76 
Advanced Phone Features..................................................... 79 
Busy Lamp Field (BLF) ....................................................................................................... 79