MS Core, Application and DatacenterJob Description for L2 IMS Core Engineer(Network Part) :1. Rich Experience in VoIP/IMS Core entities(Knowledge of P/I/S-CSCF, HSS, SLF) and VoLTE.2. Extensive experience with SIP Call processing and SIP Supplementary Services.3. In-depth understanding of Telecom Protocols and technologies like SIP,SDP,H.248,MGCP,DIAMETER etc.4. Great Conceptual understanding of IMS evolution and trends - IMS Subsystems, functionalities and IMS SIP Services call flows.5. Experience in TLS, TCP, IPSEC, IP protocols.6. Experience in integrating/working with various components of a distributed next generation IP based architecture including soft switches, Gateways, SIP Proxies, Route Engines, IP Media Servers, IP Phones/IADs is a Plus.