Primary: Core network experience - MTAS & CSCF, VoLTE/VoWiFi call flows, and Billing platforms - OCS interfaces (Diameter - Ro & Rf).
· Strong hands on experience on Core voice platforms (2G, 3G, 4G and IMS Core technologies).
· Hands on Diameter- Online & Offline billing interfaces (Ro & Rf) towards IT billing platforms (OCS).
· Working knowledge in Voice Core network elements - MTAS, CSCF and DSC/DRA (E//) ,MSC, MGW, HLR, HSS , SBG and PCRF.
· Hands-on experience in CS and IMS (VoLTE/VoWiFi) voice call flows
· Strong protocol knowledge in SIP, Diameter, RTP, MEGACO, GSM MAP and SS7/SIGTRAN
· Troubleshooting and debugging skills using tools like Wireshark, Empirix and knowledge in SS7 traffic generation tools like MGTS/IXIA.
· Ability to generate test case document and produce test report
· Ability to conduct defect management and defect analysis
· Good written and verbal communication skills
· Experience on working directly with customer on lab environment
· Hands on experience in platforms like Unix (Solaris/Linux).