2.12.2 SIP Refer Transfer .......................................................................................................1902.13 Holding Features ...........................................................................................................1912.13.1 Call Hold .......................................................................................................................1912.13.2 Call Park .......................................................................................................................1942.13.3 Call Splitting .................................................................................................................1962.13.4 Music on Hold ...............................................................................................................1972.14 Conference Features ....................................................................................................1992.14.1 Conference Features—SUMMARY ..............................................................................1992.14.2 Conference ...................................................................................................................2002.14.3 Privacy Release ...........................................................................................................2022.15 Conference Group Call Features .................................................................................2032.15.1 Conference Group Call .................................................................................................2032.16 Direct Inward System Access (DISA) Features ..........................................................2072.16.1 Direct Inward System Access (DISA) ...........................................................................2072.16.2 Automatic Fax Transfer ................................................................................................2192.16.3 Built-in Simplified Voice Message (SVM) .....................................................................2212.17 Paging Features ............................................................................................................2262.17.1 Paging ..........................................................................................................................2262.17.2 Trunk Answer From Any Station (TAFAS) ...................................................................2292.18 External Device Features .............................................................................................2302.18.1 Doorphone Call ............................................................................................................2302.18.2 Door Open ....................................................................................................................2322.18.3 External Sensor ............................................................................................................2332.18.4 External Relay Control .................................................................................................2352.19 Caller ID Features ..........................................................................................................2362.19.1 Caller ID .......................................................................................................................2362.19.2 Incoming Call Log .........................................................................................................2412.20 Message Features .........................................................................................................2442.20.1 Message Waiting ..........................................................................................................2442.20.2 Absent Message ...........................................................................................................2462.21 Proprietary Telephone (PT) Hardware Features .........................................................2482.21.1 Fixed Buttons ...............................................................................................................2482.21.2 Flexible Buttons ............................................................................................................2512.21.3 LED Indication ..............................................................................................................2552.21.4 Display Information .......................................................................................................2582.22 Administrative Information Features ..........................................................................2602.22.1 Record Log Features ....................................................................................................2602.22.1.1 Station Message Detail Recording (SMDR) ..............................................................2602.22.1.2 Syslog Record Management .....................................................................................2692.22.2 Printing Message ..........................................................................................................2702.22.3 Call Charge Services ....................................................................................................2712.23 Hospitality Features ......................................................................................................2742.23.1 Hospitality Features—SUMMARY ................................................................................2742.23.2 Room Status Control ....................................................................................................2752.23.3 Call Billing for Guest Room ..........................................................................................2782.24 Extension Controlling Features ...................................................................................2812.24.1 Extension Personal Identification Number (PIN) ..........................................................2812.24.2 Extension Feature Clear ...............................................................................................2832.24.3 Walking Extension Features .........................................................................................2852.24.3.1 Walking Extension .....................................................................................................2852.24.3.2 Enhanced Walking Extension ....................................................................................2862.24.3.3 Walking Extension-Home position control .................................................................2882.24.4 Timed Reminder ...........................................................................................................2902.25 Audible Tone Features .................................................................................................2912.25.1 Dial Tone ......................................................................................................................291Feature Guide 9Table of Contents