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