This document defines the Stage 2 service descriptions, call flows and normative Stage 3 procedures that provide cdma2000 1x circuit-switched Supplementary Services to the MS through the IMS core network when the MS is camped on a Femtocell Access Point (FAP).

Specifically, 1x Supplementary Services are provided to an MS that is attached to a FAP using the cdma2000 1x radio interface. The MS is homed in the 1x circuit-switched domain, and is registered in the 1x HLR. The system takes advantage of IMS functionality to provide subscribed services.