1.3 Telephone Features78 Operating Manual1.3.35 Do Not Disturb (DND)You can set your telephone to prevent incoming calls from ringing at your telephone. This can be useful insituations where you do not want to be disturbed, for example during a meeting.To set/cancelProgramming Manual References[PC Programming]• 9.1.2 Main [1-2]—Music on Hold• 9.1.3 Numbering Plan [1-3]—Ext. no.• 9.1.7 Timers [1-6]—Call Duration—CO-to-CO Duration Limit• 9.1.11 Detail [1-10]—Extension—Ringback Tone Pattern• 9.2.11 Extension Group [2-6]—Group No., Extension Hunting—Extension Hunting• 9.3.1 Line Mode [3-1]—Mode of incoming CO calls—Day, Night, Lunch• 9.3.2 Incoming / Outgoing [3-2]—Ringing for incoming CO calls—Day, Night, Lunch• 9.3.3 Detail [3-3]—CPC Signal Detection—Incoming, CPC Signal Detection—Outgoing• 9.6 DISA [6]• 9.8.2 Others [8-2]—DISA IRNA to BV—Day, Night, LunchFeature Manual References• 1.1.41 Direct Inward System Access (DISA)Operating Manual References• 2.1.5 Outgoing Message (OGM) for DISA• 3.2.2 System Programming (Manager Programming)—[512] DISA Security Code[530] DISA Security Code DigitsOn-hook.Enter 4 to setor 0 to cancel.Enter #.PT/SLTSetCancel40OROff-hook. Press FWD/DNDor enter 71.OR17 C.ToneAn SLT user can enter "0"instead of "#".