3-1(Section 3)System Features and OperationContentsPageA Preparation ...................................................................................................... 3-A-1B Basic Features ................................................................................................. 3-B-11.00 Flexible Numbering................................................................................ 3-B-12.00 Directory Number (DN) .......................................................................... 3-B-63.00 Floating Directory Number (FDN) .......................................................... 3-B-74.00 Tenant Service ....................................................................................... 3-B-85.00 Operator................................................................................................. 3-B-96.00 Class of Service (COS).......................................................................... 3-B-117.00 Group..................................................................................................... 3-B-127.01 Call Pickup Group........................................................................ 3-B-127.02 Uniform Call Distribution (UCD) Group........................................ 3-B-127.03 Paging Group .............................................................................. 3-B-137.04 Trunk Group ................................................................................ 3-B-138.00 Night Service ......................................................................................... 3-B-148.01 Directed Night Answer................................................................. 3-B-158.02 Universal Night Answer (UNA) .................................................... 3-B-168.03 Flexible Night Service.................................................................. 3-B-178.04 Fixed Night Service ..................................................................... 3-B-188.05 Switching of Day/Night Mode ...................................................... 3-B-199.00 Mixed Station Capacities ....................................................................... 3-B-2010.00 Variable Time-Out .................................................................................. 3-B-2111.00 Lockout .................................................................................................. 3-B-2212.00 Automatic Station Release .................................................................... 3-B-2213.00 Distinctive Dial Tone .............................................................................. 3-B-2314.00 Distinctive Busy Tone............................................................................. 3-B-2415.00 Confirmation Tone.................................................................................. 3-B-2516.00 Tone and Ringing Patterns .................................................................... 3-B-26C Outgoing Call Features .................................................................................... 3-C-11.00 Toll Restriction ...................................................................................... 3-C-11.01 Toll Restriction for Local Trunk Dial Access ................................ 3-C-31.02 Toll Restriction for Individual Trunk Group Dial Access/DirectTrunk Access............................................................................... 3-C-51.03 7 Digit Toll Restriction .................................................................. 3-C-72.00 Tone/Pulse Conversion ........................................................................ 3-C-83.00 Automatic Pause Insertion ................................................................... 3-C-9