1.1 General Features48 Feature Manual• If a CPC signal is detected on a line during a conference call, that outside party will be disconnectedbut the remaining 2 parties can continue their call.Programming Manual References[PT Programming][420] CPC Signal Detection—Incoming[421] CPC Signal Detection—Outgoing[PC Programming]9.3.3 Detail [3-3]—CPC Signal Detection—Incoming, CPC Signal Detection—OutgoingFeature Manual References1.1.41 Direct Inward System Access (DISA)1.1.32 Class of Service (COS)DescriptionEach extension is assigned a class of service (COS) number ( [601-603] TRS-COS—Day/Night/Lunch).The following features operate differently depending on an extension's COS.a) TRS ( 1.1.117 Toll Restriction (TRS))b) Walking COS ( 1.1.122 Walking COS)Conditions• Walking COSAn extension user can make a call from an extension with a lower COS by using his or her own COStemporarily.Programming Manual References[PT Programming][601-603] TRS-COS—Day/Night/Lunch[PC Programming]9.5.1 Class of Service (COS) [5-1]—Day, Night, LunchFeature Manual References1.1.117 Toll Restriction (TRS)1.1.122 Walking COSOperating Manual References1.3.85 Toll Restriction (TRS)1.3.90 Walking COS