Analog CO line programming This function allows you to program the analog COs for both day and night mode. You can select the trunk groups and ring assignments for a group of COs or individual lines. The steps are: 1. Choose CO lines to program. 2. Name the CO lines (optional). 3. Assign the CO lines’ tenant1. 4. Assign outbound CO line groups. 5. Assign distinctive CO ring tone. 6. Assign answer rings. 1. Choose CO lines to program During this step, you use the programmable keys to represent CO lines. Select lines to be programmed by pressing one or more of the programmable keys. Press the scroll keys ( or ) to “page” in increments appropriate for the port card configuration.2 The display will indicate which CO lines the programmable keys currently represent. Software will identify the port card type installed in each slot. The display will show the following information: the first line will show the port card number, the type of card, the COs available to program and a D or N for day or night mode. The second line will show the CO currently selected and the circuit that is being programmed. The appropriate programmable feature key lights will light red to indicate the lines available to program. If the port card in the first slot is a 612, the display will be: