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

Specifically, 1x circuit 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.