Telephone Features 3-873.2 Telephone Features OCondition• You may skip off-hook and press the Single-CO (S-CO) button directly.Line Access, Outside (CO) Line GroupAllows you to select an idle line within a designated outside (CO) line group.Through programming, outside (CO) lines can be divided into six line groups.PTPT and SLTFor a PT: Press the CO assignedas the Group-CO button.For an SLT: Dial 8 and the outside(CO) line group number(1 through 6).Enter thephone number.phone no.Lift the handsetor pressSP-PHONE/MONITOR .Hang up or pressSP-PHONE .Dial tone Talk.For an SLT8 outside (CO) linegroup no.For a PTCO• The CO indicator light turns green.• The display shows the phone number.Condition• You may press the Group-CO (G-CO) button directly without going off-hook.PTLine Access, IndividualAllows you to select the desired outside (CO) line without dialing the line access code.PTPress the CO assignedas a Single-CO button.Enter the phone number.phone no.Lift the handsetor pressSP-PHONE/MONITOR .Hang up or pressSP-PHONE .Dial tone Talk.CO• The CO indicator light turns green. • The display shows the phone number.