4.1.16 CO Line AccessDescriptionThere are three methods of accessing a CO line.Method Description OperationIdle Line Access (LocalAccess)Selects an idle CO lineautomatically from the assignedtrunk groups.Dial the Idle Line Access number orpress a L-CO button.Trunk Group Access Selects an idle CO line from thecorresponding trunk group.Dial the Trunk Group Access numberand a trunk group number, or press aG-CO button.S-CO Line Access Selects the desired CO linedirectly.Dial the S-CO Line Access numberand the CO line number, or press theS-CO button.Conditions• Class of Service (COS) programming determines the trunk groups available for making calls.• CO Line numbers can be referred on a CO line port basis.• Button AssignmentA flexible button can be customized as a G-CO, L-CO, or S-CO button as follows:Type Assignable parameterLoop-CO (L-CO) Any trunk group that is made available for Idle Line Access throughsystem programming is applied.Group-CO (G-CO) A trunk group is assigned.Single-CO (S-CO) A specified CO line is assigned.It is possible to assign:– the same CO line to the S-CO button and to a G-CO button.– the same trunk group to more than one G-CO button.– more than one L-CO button.Dialing the CO Line Access number selects a CO button according to the following priority: S-CO ® G-CO® L-CO• Direct CO Line AccessIf an extension user is on-hook when pressing an idle CO button, the proprietary telephone (PT)automatically enables hands-free operation mode. The user can dial without lifting the handset or pressingthe SP-PHONE button or MONITOR button.• Group Hunting Order for Idle Line AccessAn idle CO line is selected from the trunk groups assigned for Idle Line Access. If multiple trunk groupsare available, the trunk group hunting sequence can be determined through system programming.• CO Line Hunting Order for Idle Line Access and Trunk Group AccessThe CO line hunting sequence in a trunk group (from lowest numbered CO line, from highest numberedCO line or rotation) can be determined through system programming.• A company name or customer name can be assigned on a CO line port basis so that the operator orextension user who is answering the call can view the destination which the caller is trying to reach beforeanswering. This is useful, for example, when multiple companies share the same operator.Document Version 2016-03 Feature Manual 774.1.16 CO Line Access
