Analog sets do not have fixed feature keys. Instead, they rely on either using the hook-flash; for example, for transfer and conference, or Feature Access Codes.

The administrator must maximize the number of CS 1000 FFCs that are mapped to the FAC of the same digit string. For example, if FFC 4456 and FAC 4456 both trigger Call Park and Page, the user experience remains unchanged.

For more information, see Flexible Feature Codes in Appendix G: Generic station operations and Appendix H: Call processing features and services.