3 Features BFeatures 3-21B utton, Single-CO (S-CO)Description A Single-CO (S-CO) button is an outside line access button. Thisallows the proprietary telephone (PT) user to access a specific lineby pressing a S-CO button. An incoming call can be directed to anS-CO button.Conditions • The default setting for CO buttons is changeable. (Flexible CO Button)• An S-CO button provides outside line status.• It is possible to assign one outside line to a S-CO button.• If Automatic Route Selection (ARS) is set, it is overridden by anoutgoing call made by pressing the S-CO button.• Incoming calls appear on the proprietary telephone, when an extensionis assigned as the incoming call destination and a S-CO and/or Loop-CO (L-CO) button is assigned.• Immediate, delayed, no ringing or no incoming call (disable) can beselected on an extension–outside line basis.• The digital PT user can choose a desired ringing tone type for the S-CObutton by System or Station Programming.Programming ReferencesSection 4, System Programming[005] Flexible CO Button Assignment[400] Outside Line Connection Assignment[603]–[604] DIL 1:N Extension and Delayed Ringing — Day / Night[605]–[606] Outgoing Permitted Outside Line Assignment — Day / NightStation Programming.......................................................User ManualFlexible Button Assignment – Single-CO (S-CO) ButtonRinging Tone Selection for CO ButtonsFeature References Section 3, FeaturesAnswering, Direct Outside Line Line Access, IndividualLED Indication, Outside Line Ringing, DelayedLine Access, Direct Ringing Tone Selection for COButtonsOperation References Basic Operation—User Manual Making Calls Receiving CallsDPT FeaturesOutward Dialing – Line Access, Individual
