Why IMS ? What benefits does IMS bring ? Features of IMS Network IMS Layers Transport / Media Endpoint Layer Backhaul network Border Gateways Session & Control Layer HSS (Home Subscriber Server) SCF (Call Session Control Function) MGw (Media Gateway Control Function) Application Services Layer TAS (Telephony Application Server) IM-SSF ( IP Multimedia Services Switching … Continue reading IP Multimedia Subsystem (IMS)