Feature Guide 71.6.1 Memory Dialing Features................................................................................................. 611.6.1.1 Memory Dialing Features—OVERVIEW ..........................................................................................................611.6.1.2 One-touch Dialing ............................................................................................................................................621.6.1.3 Last Number Redial .........................................................................................................................................631.6.1.4 Speed Dialing—Personal/System ....................................................................................................................631.6.1.5 Quick Dialing ....................................................................................................................................................641.6.1.6 Hot Line............................................................................................................................................................651.7 Busy Line/Busy Party Features .................................................................................... 661.7.1 Automatic Callback Busy (Camp-on) ............................................................................... 661.7.2 Executive Busy Override.................................................................................................. 661.7.3 Call Monitor...................................................................................................................... 671.7.4 Call Waiting Tone ............................................................................................................. 681.8 Toll Restriction (TRS) Features .................................................................................... 691.8.1 Toll Restriction (TRS) ....................................................................................................... 691.8.2 Extension Dial Lock ......................................................................................................... 731.8.3 Dial Tone Transfer ............................................................................................................ 741.8.4 Walking COS.................................................................................................................... 751.8.5 Verified Code Entry .......................................................................................................... 751.9 Automatic Route Selection (ARS) Features ................................................................ 781.9.1 Automatic Route Selection (ARS) .................................................................................... 781.10 Conversation Features .................................................................................................. 841.10.1 Hands-free Operation ...................................................................................................... 841.10.2 Mute ................................................................................................................................. 841.10.3 Headset Operation........................................................................................................... 841.10.4 Data Line Security............................................................................................................ 851.10.5 Flash/Recall/Terminate .................................................................................................... 851.10.6 External Feature Access (EFA)........................................................................................ 861.10.7 CO Line Call Limitation .................................................................................................... 861.10.8 Paralleled Telephone........................................................................................................ 881.10.9 Calling Party Control (CPC) Signal Detection.................................................................. 891.11 Transferring Features .................................................................................................... 901.11.1 Call Transfer ..................................................................................................................... 901.12 Holding Features............................................................................................................ 921.12.1 Call Hold .......................................................................................................................... 921.12.2 Call Park .......................................................................................................................... 931.12.3 Call Splitting ..................................................................................................................... 941.12.4 Music on Hold .................................................................................................................. 951.12.5 Consultation Hold............................................................................................................. 961.13 Conference Features ..................................................................................................... 971.13.1 Conference Features ....................................................................................................... 971.13.1.1 Conference Features—OVERVIEW.................................................................................................................971.13.1.2 Conference.......................................................................................................................................................971.13.1.3 Privacy Release ...............................................................................................................................................981.14 Paging Features ........................................................................................................... 1001.14.1 Paging ............................................................................................................................ 1001.15 Optional Device Features ............................................................................................ 1021.15.1 Doorphone Call .............................................................................................................. 1021.15.2 Door Open ..................................................................................................................... 1031.15.3 Trunk Answer From Any Station (TAFAS) ...................................................................... 1031.15.4 Background Music (BGM) .............................................................................................. 1041.15.5 Outgoing Message (OGM)............................................................................................. 1041.15.6 Direct Inward System Access (DISA) ............................................................................ 106