2.5.4.5 Reverse Circuit ..........................................................................................................101
2.5.4.6 Trunk Busy Out ..
........................................................................................................102
2.5.4.7 Pause Insertion ..........................................................................................................103
2.5.4.8 Host PBX Access Code (Access Code to the Telephone Company from a Host
PBX) ..........................................................................................................................104
2.5.4.9 Special Carrier Access Code .....................................................................................106
2.5.5 Seizing a Line Features ................................................................................................107
2.5.5.1 Seizing a Line Features—SUMMARY .......................................................................107
2.5.5.2 Line Preference—Outgoing .......................................................................................108
2.5.5.3 Trunk Access .............................................................................................................109
2.6 Memory Dialling Features ............................................................................................111
2.6.1 Memory Dialling Features—SUMMARY ......................................................................111
2.6.2 One-touch Dialling ........................................................................................................113
2.6.3 Last Number Redial ......................................................................................................114
2.6.4 Speed Dialling—Personal/System ...............................................................................116
2.6.5 Quick Dialling ...............................................................................................................118
2.6.6 Hot Line ........................................................................................................................119
2.7 Toll Restriction (TRS)/Call Barring (Barring) Features ..............................................120
2.7.1 Toll Restriction (TRS)/Call Barring (Barring) ................................................................120
2.7.2 Budget Management ....................................................................................................127
2.7.3 Extension Dial Lock ......................................................................................................128
2.7.4 Dial Tone Transfer ........................................................................................................129
2.7.5 Walking COS ................................................................................................................130
2.7.6 Verification Code Entry .................................................................................................132
2.8 Automatic Route Selection (ARS) Features ...............................................................134
2.8.1 Automatic Route Selection (ARS) ................................................................................134
2.9 Primary Directory Number (PDN)/Secondary Directory Number (SDN)
Features .........................................................................................................................140
2.9.1 Primary Directory Number (PDN)/Secondary Directory Number (SDN)
Extension ......................................................................................................................140
2.10 Busy Line/Busy Party Features ...................................................................................146
2.10.1 Automatic Callback Busy (Camp-on) ...........................................................................146
2.10.2 Executive Busy Override ..............................................................................................147
2.10.3 Call Monitor ..................................................................................................................149
2.10.4 Second Call Notification to Busy Extension .................................................................151
2.10.4.1 Second Call Notification to Busy Extension—SUMMARY .........................................151
2.10.4.2 Call Waiting Tone ......................................................................................................153
2.10.4.3 Off-hook Call Announcement (OHCA) .......................................................................154
2.10.4.4 Whisper OHCA ..........................................................................................................155
2.11 Conversation Features .................................................................................................157
2.11.1 Hands-free Operation ...................................................................................................157
2.11.2 Off-hook Monitor ...........................................................................................................158
2.11.3 Mute .............................................................................................................................159
2.11.4 Headset Operation .......................................................................................................160
2.11.5 Data Line Security ........................................................................................................161
2.11.6 Flash/Recall/Terminate ................................................................................................162
2.11.7 External Feature Access (EFA) ....................................................................................163
2.11.8 Trunk Call Limitation .....................................................................................................164
2.11.9 Calling Party Control (CPC) Signal Detection ..............................................................166
2.11.10 One-numbered Extension ............................................................................................167
2.12 Transferring Features ...................................................................................................169
2.12.1 Call Transfer .................................................................................................................169
2.12.2 SIP Refer Transfer .......................................................................................................173
2.13 Holding Features ...........................................................................................................174
2.13.1 Call Hold .......................................................................................................................174
8 Feature Guide
Table of Contents