2138 AppendixFeature Number ListNumbers listed below are the initial factory setting (default value). There are the flexiblefeature numbers and the fixed feature numbers. To change the flexible feature numbers, followthe procedure described in the “System Programming” section in the Installation Manual.Flexible Feature NumbersDefault Required Additional DigitsFeature23—7504946657107107107147145053 / 51524414072073179179359711711711575756580 through 9, 00 through 990 through 9, 00 through 990 through 9, 00 through 991 - 9 / 0Account code + #(99)2-5 + EXTN. (extension number) / 06 + phone number + #7 + EXTN. / 8 + EXTN.1 + forwarding EXTN. + EXTN.0 + forwarding EXTN.0 - 9EXTN.1 / 01 / 0EXTN.EXTN.1 / 2 / 0123 + CLIP number + #lock code (000 - 999) twicelock code (000 - 999)1 / 01 / 01st hundred extension block2nd hundred extension block3rd through 16th hundred extension blockAbsent Message Capability set/cancelAccount Code EntryAutomatic Callback Busy (Camp-On) cancelBackground Music (BGM) — External on/offCall Forwarding set/cancelCall Forwarding to CO LineCall Forwarding — Follow Me set/cancelCall Forwarding — from Hunting Group set/cancelCall HoldCall Hold, Retrieve outside call/intercom callCall Park/Call Park RetrieveCall Pickup, CO LineCall Pickup, DirectedCall Pickup, GroupCall Pickup Deny set/cancelCall Waiting set/cancelClass of Service (COS) Switch — PrimaryClass of Service (COS) Switch — SecondaryCLIR once/continue/cancelCLIP / COLP— for a CO line— for an extension— to select a desired CLIP number for onceCO Incoming Call Information Log Lock lockunlockCO Incoming Call Information Log Lock Modeset/cancelCOLR set/cancel