1.1 General FeaturesFeatures Guide 37Button, Single-CO (S-CO)DescriptionA Single-CO (S-CO) button is a CO line access button. This allows the digital proprietarytelephone user to access a specific line by pressing an S-CO button. An incoming call can bedirected to an S-CO button.Conditions• An S-CO button provides CO Line status.• Incoming calls appear on the digital proprietary telephone, when an extension is assignedas the incoming call destination and an S-CO and/or L-CO button is assigned.• Immediate, delayed, no ringing or no incoming call (disable) can be selected on anextension-CO line basis.• The digital proprietary telephone user can choose a desired ringing tone type for the S-CObutton by System or Station Programming.Programming Guide References• [005] Flexible CO Button/PF Key Assignment• [400] CO Port Connection Assignment• [605-606] Outgoing Permitted CO Line Assignment — Day/NightFeatures Guide References• Answering, Direct CO Line• Line Access, Direct• Line Access, Individual• Ringing Tone Selection for CO ButtonsUser Manual References• 2.2.1 Basic Calling• 2.3.1 Answering Calls• 4.1.3 Customising the Buttons
