6.5 Remote Phone Book ...........................................................................................................68
6.6 Contact Backup...................................................................................................................69
6.7 Blacklist...............................................................................................................................70
6.8 Directory List for Directory/Dir Soft Key ...............................................................................70
6.9 Favorite Contacts ................................................................................................................71
6.10 History List Display in Web UI............................................................................................72
7. Audio Features ......................................................................................................................73
7.1 Dial Tone.............................................................................................................................73
7.2 Stutter Tone.........................................................................................................................73
7.3 Ring Tones..........................................................................................................................73
7.4 Distinctive Ring Tones.........................................................................................................76
7.5 Ringer Device......................................................................................................................79
7.6 Tones..................................................................................................................................79
7.7 Audio Codecs......................................................................................................................81
7.8 Packetization Time (PTime).................................................................................................82
7.9 Early Media .........................................................................................................................83
7.10 Acoustic Clarity Technology ..............................................................................................83
7.11 DTMF................................................................................................................................84
7.12 Voice Quality Monitoring (VQM) ........................................................................................85
7.13 Suppress DTMF Display....................................................................................................86
8. Multiple SIP Accounts............................................................................................................87
8.1 Account Registration ...........................................................................................................87
8.2 Server Redundancy.............................................................................................................90
8.3 SIP Server Name Resolution...............................................................................................91
9. Call Log .................................................................................................................................93
9.1 Call Log Display ..................................................................................................................93
9.2 Call Log Configuration.........................................................................................................93
10. Call Features......................................................................................................................94
10.1 Dial Plan............................................................................................................................94
10.2 Hotline...............................................................................................................................99
10.3 Recall..............................................................................................................................100
10.4 Speed Dial.......................................................................................................................100
10.5 Call Timeout....................................................................................................................101
10.6 Auto Dial Out Timer.........................................................................................................101
10.7 Anonymous Call ..............................................................................................................102
10.8 Anonymous Call Rejection...............................................................................................103
10.9 Call Number Filter............................................................................................................103
10.10 IP Address Call..............................................................................................................104
10.11 Auto Answer..................................................................................................................105
10.12 Call Waiting...................................................................................................................105
10.13 Do Not Disturb (DND)....................................................................................................106