User Guide for the SIP-T23P/T23G IP Phone 
viii 
Volume ............................................................................................................................. 27 
Ring Tones ........................................................................................................................ 27 
Contact Management....................................................................................................... 29 
Directory........................................................................................................................... 29 
Local Directory ................................................................................................................ 31 
Blacklist ............................................................................................................................ 41 
Remote Phone Book........................................................................................................ 43 
Call History Management ................................................................................................ 45 
System Customizations...................................................................................................... 47 
Logo Customization ........................................................................................................ 47 
Headset Use.................................................................................................................... 48 
DSS Keys .......................................................................................................................... 50 
Account Management ................................................................................................... 59 
Dial Plan ........................................................................................................................... 60 
Emergency Number........................................................................................................ 66 
Live Dialpad .................................................................................................................... 67 
Hotline .............................................................................................................................. 68 
Basic Call Features................................................................. 69 
Placing Calls ....................................................................................................................... 70 
Answering Calls ................................................................................................................. 72 
Ending Calls........................................................................................................................ 73 
Redialing Numbers ............................................................................................................ 73 
Recent Call In Dialing ........................................................................................................ 74 
Auto Answer ....................................................................................................................... 75 
Auto Redial.......................................................................................................................... 75 
Call Completion ................................................................................................................. 77 
ReCall .................................................................................................................................. 78 
Call Mute............................................................................................................................. 78 
Call Hold/Resume............................................................................................................... 79 
Do Not Disturb (DND) ........................................................................................................ 80 
Call Forward ....................................................................................................................... 83 
Call Transfer ........................................................................................................................ 89 
Call Waiting ........................................................................................................................ 91 
Conference ......................................................................................................................... 91 
Local Conference............................................................................................................ 91 
Network Conference ...................................................................................................... 92 
Call Park .............................................................................................................................. 94 
Call Pickup .......................................................................................................................... 95 
Anonymous Call ................................................................................................................. 99 
Anonymous Call Rejection .............................................................................................. 100 
Advanced Phone Features....................................................101