1.3 C54 Feature ManualConditions• 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: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 orpressing the 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 reachbefore answering. This is useful, for example, when multiple companies share the same operator.• It is possible to identify the CO line port that has a CO line connected to it. This prevents extension usersfrom originating a call to a CO line which is not connected.Method Description OperationIdle Line Access(Local Access)Selects an idle CO line automaticallyfrom the assigned trunk 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 number anda trunk group number, or press a G-CObutton.S-CO Line Access Selects the desired CO line directly. Dial the S-CO Line Access number andthe CO line number, or press the S-CObutton.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.
