FeatureDefaultType 1(with )Type 2(without )Extension Numbering Scheme 15—Leading Number None 24Extension Numbering Scheme 16—Leading Number None 25Extension Numbering Scheme 17—Leading Number None 26Extension Numbering Scheme 18—Leading Number None 27Extension Numbering Scheme 19—Leading Number None 28Extension Numbering Scheme 20—Leading Number None NoneExtension Numbering Scheme 21—Leading Number 5 19Extension Numbering Scheme 22—Leading Number 6 29Extension Numbering Scheme 23–64—Leading Number None NoneOperator Call 9 / 0 0Idle Line Access (Local Access) 0 / 1 / 9 9Trunk Group Access 8 8TIE Line Access 7 NoneRedial # #Speed Dialling—System/PersonalPersonal Speed Dialling—Programming 30 30Doorphone Call 31 31Broadcasting 32 NoneGroup Paging 33 33External BGM on/off 35 35Outgoing Message (OGM) playback/record/clear 36 36S-CO Line Access 37 37SVM—Personal Greeting Message playback/record/clear 38 NoneGroup Call Pickup 40 40Directed Call Pickup 41 41TAFAS—Calls through an External Pager 42 42Group Paging answer 43 43Automatic Callback Busy cancel/CCBS cancel 46 46User Remote Operation/Walking COS/Verification Code Entry 47 47Wireless XDP Parallel Mode set/cancel 48 48Account Code Entry 49 49354 Feature Guide2.3.6 Flexible Numbering/Fixed Numbering