4.1.12 Doorphone Call ..............................................................................................................875 Features and Configurations—E ..........................................................895.1 E ........................................................................................................................................905.1.1 EFA (External Feature Access) ......................................................................................905.1.2 Emergency Call ..............................................................................................................915.1.3 Executive Busy Override ................................................................................................915.1.4 Extension Dial Lock ........................................................................................................925.1.5 Extension Feature Clear .................................................................................................935.1.6 Extension PIN (Personal Identification Number) ............................................................945.1.7 Extension Port Configuration ..........................................................................................955.1.8 External Relay ................................................................................................................965.1.9 External Sensor ..............................................................................................................986 Features and Configurations—F ........................................................1016.1 F ......................................................................................................................................1026.1.1 Fixed Buttons ...............................................................................................................1026.1.2 Flash/Recall/Terminate ................................................................................................1046.1.3 Flexible Buttons ............................................................................................................1056.1.4 Flexible Numbering/Fixed Numbering ..........................................................................1076.1.5 Floating Extension ........................................................................................................1136.1.6 FWD (Call Forwarding) .................................................................................................1156.1.7 FWD/DND Button, Group FWD Button ........................................................................1187 Features and Configurations—G ........................................................1237.1 G .....................................................................................................................................1247.1.1 GROUP FEATURES ....................................................................................................1248 Features and Configurations—H ........................................................1298.1 H ......................................................................................................................................1308.1.1 Hands-free Answerback ...............................................................................................1308.1.2 Hands-free Operation ...................................................................................................1318.1.3 Headset Operation .......................................................................................................1318.1.4 HOSPITALITY FEATURES ..........................................................................................1328.1.5 Host PBX Access Code (Access Code to the Telephone Company from a HostPBX) .............................................................................................................................1328.1.6 Hot Line ........................................................................................................................1349 Features and Configurations—I ..........................................................1379.1 I .......................................................................................................................................1389.1.1 ICD GROUP FEATURES .............................................................................................1389.1.2 ICD Group Features—Group Call Distribution .............................................................1419.1.3 ICD Group Features—Log-in/Log-out ..........................................................................1449.1.4 ICD Group Features—Outside Destinations ................................................................1479.1.5 ICD Group Features—Overflow ...................................................................................1499.1.6 ICD Group Features—Queuing ....................................................................................1519.1.7 ICD Group Features—Supervisory ..............................................................................1539.1.8 ICD Group Features—VIP Call ....................................................................................1559.1.9 Idle Extension Hunting .................................................................................................1569.1.10 INCOMING CALL FEATURES .....................................................................................1579.1.11 Intercept Routing ..........................................................................................................1609.1.12 Intercept Routing—No Destination ...............................................................................1649.1.13 Intercom Call ................................................................................................................1659.1.14 Internal Call Block ........................................................................................................1669.1.15 IP-PT (IP Proprietary Telephone) .................................................................................1678 Feature Manual Document Version 2009-12Table of Contents