Features 3-333 Features LLine Access ButtonsA proprietary telephone (PT) user must assign one of the following 3 types of CO buttons toflexible CO buttons in the Proprietary Telephone Settings. This allows making or receivingoutside calls. The default setting for the flexible CO buttons (CO 1 – CO 6) are Single-CO(S-CO) buttons. CO 1 corresponds to outside (CO) line 1, CO 2 corresponds to outside(CO) line 2, etc.Receiving or making outside calls is on an outside (CO) line group basis. The outside (CO)line group is assigned in program [404]. Any incoming call from any outside (CO) line inthe outside (CO) line group arrives at the G-CO button. To make an outside call, the usercan access an idle outside (CO) line in the group by simply pressing the assigned G-CObutton.Receiving or making outside calls is done using a specific outside (CO) line. An incomingcall from the specific outside (CO) line arrives at the S-CO button. To make an outside call,the user can access the specific outside (CO) line by simply pressing the assigned S-CObutton.Outside (CO) lines, which are not assigned to an S-CO or G-CO button, can be assigned to aflexible CO button as the O-CO button. An incoming call on an outside (CO) lines arrives atthe O-CO. To make an outside call, the user simply presses the assignedO-CO button.• The same outside (CO) line group can be assigned to more than one G-CO button on thesame PT.• The same line can be assigned to an S-CO button and G-CO button. TheS-CO button has priority.• Immediate, delayed, no ringing or no incoming calls (disable) can be selected byprograms [405] through [413] on an extension-outside (CO) line basis.• A ringing pattern can be selected for each outside (CO) line by program [423].• Required System Programming[400] Outside (CO) Line Connection Assignment[404] Outside (CO) Line Group Assignment[405]–[407] Flexible Outward Dialing Assignment — Day/Night/Lunch[408]–[410] Flexible Ringing Assignment — Day/Night/Lunch[411]–[413] Delayed Ringing Assignment — Day/Night/Lunch[423] Outside (CO) Line Ringing Pattern Selection• Related Feature ReferencesRinging Pattern Selection, Outside Calling, Receiving Calls• Operating Instructions Reference1.2 Proprietary Telephone Settings, “Customizing the Buttons on Your Telephone”,Line Access Buttons+!!