• Architecture of IMS, SBC, VOLTE, CSCF, BGCF, MGCF, MGW, SLF, MTAS, IPWorks, MRFC, e-SRVCC, T-ADS.
• Knowledge of IMS (IP Multimedia Subsystem), VoLTE, IMS KPI.
• Understanding of Call flows.
• Knowledge of SIP, SDP, H.248, RTP and Diameter.
• Knowledge of FAX Protocols, DTMF Relay, Voice Quality, DHCP, DNS, SNMP, Speech codec(G.711/G.729/G.722), RTP/RTCP.
• Trace analysis in IMS, SIP trace analysis and troubleshooting.
• Traffic generating tools such as IXIA, Smart bits, SIPp.
• Understanding of performing Functional Testing, Regression Testing, Load Testing, Performance Testing, Stress Testing, System Testing.