Feature Guide 71.5.5.2 Line Preference—Outgoing ................................................................................................................. 831.5.5.3 Trunk Access ....................................................................................................................................... 841.6 Memory Dialling Features ....................................................................................861.6.1 Memory Dialling Features .......................................................................................861.6.1.1 Memory Dialling Features—SUMMARY .............................................................................................. 861.6.1.2 One-touch Dialling ............................................................................................................................... 881.6.1.3 KX-T7710 One-touch Dialling (KX-TDA100/KX-TDA200 only) ............................................................ 891.6.1.4 Last Number Redial ............................................................................................................................. 901.6.1.5 Speed Dialling—Personal/System ....................................................................................................... 911.6.1.6 Quick Dialling ....................................................................................................................................... 921.6.1.7 Hot Line................................................................................................................................................ 931.7 Busy Line/Busy Party Features ...........................................................................941.7.1 Automatic Callback Busy (Camp-on) ......................................................................941.7.2 Executive Busy Override .........................................................................................951.7.3 Call Monitor.............................................................................................................961.7.4 Second Call Notification to Busy Extension ............................................................971.7.4.1 Second Call Notification to Busy Extension—SUMMARY ................................................................... 971.7.4.2 Call Waiting Tone ................................................................................................................................. 991.7.4.3 Off-hook Call Announcement (OHCA) ............................................................................................... 1001.7.4.4 Whisper OHCA .................................................................................................................................. 1011.8 Toll Restriction (TRS)/Call Barring (Barring) Features ....................................1021.8.1 Toll Restriction (TRS)/Call Barring (Barring) .........................................................1021.8.2 Budget Management.............................................................................................1071.8.3 Extension Lock......................................................................................................1081.8.4 Dial Tone Transfer .................................................................................................1091.8.5 Walking COS.........................................................................................................1101.8.6 Verified Code Entry ...............................................................................................1111.9 Automatic Route Selection (ARS) Features .....................................................1131.9.1 Automatic Route Selection (ARS) .........................................................................1131.10 Conversation Features .......................................................................................1181.10.1 Hands-free Operation ...........................................................................................1181.10.2 Off-hook Monitor ...................................................................................................1191.10.3 Mute ......................................................................................................................1201.10.4 Headset Operation ................................................................................................1211.10.5 Data Line Security.................................................................................................1221.10.6 Flash/Recall/Terminate .........................................................................................1231.10.7 External Feature Access (EFA).............................................................................1241.10.8 Trunk Call Limitation..............................................................................................1251.10.9 Parallelled Telephone ............................................................................................1261.10.10 Calling Party Control (CPC) Signal Detection .......................................................1291.11 Transferring Features .........................................................................................1301.11.1 Call Transfer ..........................................................................................................1301.12 Holding Features.................................................................................................1321.12.1 Call Hold ...............................................................................................................1321.12.2 Call Park................................................................................................................1341.12.3 Call Splitting ..........................................................................................................1351.12.4 Music on Hold .......................................................................................................1361.13 Conference Features ..........................................................................................1371.13.1 Conference Features ............................................................................................1371.13.1.1 Conference Features—SUMMARY.................................................................................................... 1371.13.1.2 Conference ........................................................................................................................................ 1381.13.1.3 Privacy Release ................................................................................................................................. 1401.14 Paging Features ..................................................................................................141