1.5.4.8 Host PBX Access Code (Access Code to the Telephone Company from a HostPBX) ............................................................................................................................851.5.4.9 Special Carrier Access Code .......................................................................................871.5.5 Seizing a Line Features ..................................................................................................881.5.5.1 Seizing a Line Features—SUMMARY .........................................................................881.5.5.2 Line Preference—Outgoing .........................................................................................891.5.5.3 Trunk Access ...............................................................................................................901.6 Memory Dialling Features ..............................................................................................921.6.1 Memory Dialling Features ..............................................................................................921.6.1.1 Memory Dialling Features—SUMMARY ......................................................................921.6.1.2 One-touch Dialling .......................................................................................................941.6.1.3 KX-T7710 One-touch Dialling ......................................................................................951.6.1.4 Last Number Redial .....................................................................................................961.6.1.5 Speed Dialling—Personal/System ...............................................................................971.6.1.6 Quick Dialling ...............................................................................................................991.6.1.7 Hot Line .....................................................................................................................1001.7 Primary Directory Number (PDN)/Secondary Directory Number (SDN)Features .........................................................................................................................1011.7.1 Primary Directory Number (PDN)/Secondary Directory Number (SDN)Extension ......................................................................................................................1011.8 Busy Line/Busy Party Features ...................................................................................1061.8.1 Automatic Callback Busy (Camp-on) ...........................................................................1061.8.2 Executive Busy Override ..............................................................................................1071.8.3 Call Monitor ..................................................................................................................1081.8.4 Second Call Notification to Busy Extension .................................................................1091.8.4.1 Second Call Notification to Busy Extension—SUMMARY .........................................1091.8.4.2 Call Waiting Tone ......................................................................................................1111.8.4.3 Off-hook Call Announcement (OHCA) .......................................................................1121.8.4.4 Whisper OHCA ..........................................................................................................1131.9 Toll Restriction (TRS)/Call Barring (Barring) Features ..............................................1141.9.1 Toll Restriction (TRS)/Call Barring (Barring) ................................................................1141.9.2 Budget Management ....................................................................................................1211.9.3 Extension Dial Lock ......................................................................................................1221.9.4 Dial Tone Transfer ........................................................................................................1231.9.5 Walking COS ................................................................................................................1241.9.6 Verification Code Entry .................................................................................................1251.10 Automatic Route Selection (ARS) Features ...............................................................1271.10.1 Automatic Route Selection (ARS) ................................................................................1271.11 Conversation Features .................................................................................................1321.11.1 Hands-free Operation ...................................................................................................1321.11.2 Off-hook Monitor ...........................................................................................................1331.11.3 Mute .............................................................................................................................1341.11.4 Headset Operation .......................................................................................................1351.11.5 Data Line Security ........................................................................................................1361.11.6 Flash/Recall/Terminate ................................................................................................1371.11.7 External Feature Access (EFA) ....................................................................................1381.11.8 Trunk Call Limitation .....................................................................................................1391.11.9 Parallelled Telephone ...................................................................................................1411.11.10 Calling Party Control (CPC) Signal Detection ..............................................................1431.12 Transferring Features ...................................................................................................1441.12.1 Call Transfer .................................................................................................................1441.13 Holding Features ...........................................................................................................1481.13.1 Call Hold .......................................................................................................................1481.13.2 Call Park .......................................................................................................................1501.13.3 Call Splitting .................................................................................................................151Feature Guide 9Table of Contents