2.2 System Configuration—SoftwareFeature Guide 2832.2 System Configuration—Software2.2.1 Class of Service (COS)DescriptionEach extension is assigned a COS number ( Class of Service [602]). The following featuresare controlled on a COS basis:a) Internal Call Block ( 1.1.2.2 Internal Call Block)b) FWD ( 1.3.1.2 Call Forwarding (FWD))c) DND Override ( 1.3.1.3 Do Not Disturb (DND))d) Call Pickup ( 1.4.1.3 Call Pickup)e) Account Code Entry ( 1.5.4.3 Account Code Entry)f) External Call Block ( 1.5.5.3 Trunk Access)g) Executive Busy Override ( 1.7.2 Executive Busy Override)h) Call Monitor ( 1.7.3 Call Monitor)i) OHCA ( 1.7.4.3 Off-hook Call Announcement (OHCA))j) Whisper OHCA ( 1.7.4.4 Whisper OHCA)k) TRS/Call Barring ( 1.8.1 Toll Restriction (TRS)/Call Barring (Barring))l) Extension Lock ( 1.8.3 Extension Lock)m) Walking COS ( 1.8.5 Walking COS)n) Trunk Call Limitation ( 1.10.8 Trunk Call Limitation)o) Call Transfer ( 1.11.1 Call Transfer)p) Door Open ( 1.16.2 Door Open)q) DISA ( 1.16.6 Direct Inward System Access (DISA))r) Call Forwarding (CF)—by ISDN (P-MP) ( 1.20.1.4 Call Forwarding (CF)—by ISDN(P-MP))s) Wireless XDP Parallel Mode ( 1.24.5 Wireless XDP Parallel Mode)t) SMDR for Outgoing Trunk Call ( 1.25.1 Station Message Detail Recording (SMDR))u) Time Service Switching ( 2.2.4 Time Service)v) Manager Features ( 2.2.6 Manager Features)w) PT Programming ( 2.3.2 PT Programming)Conditions• Walking COSExtension users can make a call from other extensions of the lower level COS by usingtheir own higher level COS temporarily.User Manual ReferencesUser Manual1.2.7 Calling without Restrictions