An IP Multimedia Subsystem Service Control Point (IMS-SCP) module of a carrier network may provide trigger management for a request for a circuit switched (CS) call. For example, an IMS-SCP module may receive an request for a CS call associated with a user equipment. The IMS-SCP module may determine handling of the request for the CS call includes one or more first operations by a first feature platform and one or more second operations by a second feature platform. In response to the determining, the IMS-SCP module may perform trigger management associated with the request for the CS call. The trigger management may include invoking, by the IMS-SCP module, the one or more first operations of the first feature platform and, subsequent to the invoking the one or more first operations, invoking the one or more second operations of the second feature platform.