The IMS Core (IP Multimedia Subsystem Core) is a framework that enables the delivery of multimedia services over IP networks. It supports voice, video, and messaging services, allowing seamless communication across different devices and networks. This architecture is essential for modern telecommunications, as it integrates various services into a unified platform. At its core, the IMS Core consists of several key components, including the Call Session Control Function (CSCF) and the Home Subscriber Server (HSS). These elements work together to manage user sessions, authenticate subscribers, and ensure quality of service. This system is crucial for service providers looking to offer advanced communication features.