# Customize Your FCOS

When you are ready to customize an FCOS, use the FCOS and feature bit descriptions in this section to complete the FCOS Worksheet.

## Modify a Copy of an Existing FCOS:

1. Select the existing FCOS that you want to use as a basis for your customized FCOS.

2. Complete an FCOS Worksheet.

3. From the Main Menu, select (S) System Maintenance, (R) Reconfiguration, (F) Feature COS.

   Note: You can quit at any point in the following steps before you exit the Feature Class of Service Menu. Quitting discards all entries you have made and leaves the FCOS settings the way they were before you reached the Feature Class of Service Menu. To quit, select (Q) Quit - Forget Changes from the Feature COS menu.

4. Select (C) Current FCOS and enter a number for your customized FCOS (18-20 or 25-640).

5. Select (N) Name FCOS and enter a descriptive name for the customized FCOS.

6. Select (K) Copy FCOS and enter the number of the FCOS you want to use as the basis for your customized FCOS. A copy of this FCOS is created and given the number and name you assigned above.

7. To add feature bits to the customized FCOS, select (A) Add Features OR to delete feature bits, select (D) Delete Features and enter feature bits in the following format:

   - a single bit, for example: 208

   - a range of bits, for example: 202-208

   - a series of bits, for example: 39,40,207,208

   - a mixed entry, for example: 37, 49, 52-72, 201,202 (do not enter spaces after commas and do not end the entry with a comma)

8. To verify that the information you have entered is correct, select (S) Show FCOS and enter the number of the customized FCOS version.

9. After verification, save the customized FCOS by exiting from the FCOS menu.

## Create a New FCOS

To customize an FCOS by creating a new one:

1. Complete an FCOS Worksheet.

2. From the Main Menu, select (S) System Maintenance, (R) Reconfiguration, and then (F) Feature COS.

3. Select (C) Current FCOS and enter a number for your new FCOS (18-20 or 25-640).

4. Select (N) Name FCOS and enter a descriptive name for the new FCOS.

5. Select (A) Add Features and enter the feature bits that comprise the new FCOS in the following format:

   - a single bit, for example: 208

   - a range of bits, for example: 202-208

   - a series of bits, for example: 39,40,207,208

   - a mixed entry, for example: 37, 49, 52-72, 201,202 (do not enter spaces after commas and do not end the entry with a comma)

6. To verify that the information you have entered is correct, select (S) Show FCOS and enter the number of the customized FCOS version.

7. After verification, save the new FCOS by exiting from the FCOS menu.