4.8 Extension ProgrammingClass of Service601System Programming 4-121Description Programs each extension for Class of Service (COS). The COSdetermines the call handling abilities of each extension.Selection • Jack number: 1 through 8, (-1 / -2),( =all jacks, -1 = first part, -2 = second part)• COS number: 1 through 8Default All jacks-1/2 – COS 1Programming 1. Enter 601.Display: 601 COS #2. Press NEXT.Display: Jack NO?→3. Enter a jack number.To enter jack number 1, you can also press NEXT.To select the second part (-2), press NEXT after entering a jack number.Display example: #1-1:COS14. Enter a COS number.To change the current entry, enter the new number.5. Press STORE.6. To program another jack, press NEXT or PREV, orSELECT and the desired jack number.7. Repeat steps 4 through 6.8. Press END.Conditions • There is a maximum of eight Classes of Service. Every extensionmust be assigned to a Class of Service and is subject to the COSProgramming of programs [500] through [509] and [991].• For an explanation of jack numbering, see “Rotation of jack number”on page 4-7.• To assign all jacks to one COS, press the key in step 3. In thiscase, the display shows the contents programmed for Jack 1.Feature References Section 3, FeaturesClass of Service (COS)