1-10 Operations1.2 Proprietary Telephone SettingsPTDSS (Direct Station Selection) ButtonPress the programmable button. Press STORE.Dial 1.1 AUTO DIALSTOREextension no.Enter an extension number(100 through 199).COMESSAGEGroup-CO (G-CO) ButtonTo use outside (CO) lines efficiently, a group of outside (CO) lines (outside (CO) line group)can be assigned to a CO button. This button is referred to as Group-CO (G-CO) button. Anyincoming calls from any outside (CO) line in the outside (CO) line group arrive at the G-CObutton. To make an outside call, you can access an idle outside (CO) line in the group bysimply pressing the assigned G-CO button.• The same line can be assigned as a S-CO button and G-CO button.• The extension for making and/or receiving calls in outside (CO) line groups must beprogrammed.• When your extension is assigned as the incoming call destination for an outside (CO) line,you cannot receive any incoming outside calls unless a G-CO, O-CO or S-CO buttonassociated with the line is assigned.PTPress the programmable button. Dial #. Enter an outside (CO) line group number(1 through 6).Press STORE.AUTO DIALSTORECO outside (CO) line group no.#!!• 1.3 Making Calls, “Intercom Calling”+