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About the role
T3 Support IMS /CS CORE EXPERT Role Summary The L3 IMS/CS Core Expert is responsible for advanced troubleshooting, performance optimization, and end-to-end support of IMS and Circuit Switched (CS) Core network elements. The role involves handling complex issues escalated from L1/L2 teams, ensuring service continuity, and providing expertise for incident, problem, and change management. With these activities, you will have a great impact on our business: Key Responsibilities L3 Technical Support Provide advanced troubleshooting for IMS and CS Core issues (VoLTE, VoWiFi, MO/MT call failures, SMS failures, Handover failures). Analyze call traces (SIP, Diameter, ISUP, MAP, CAP) and perform deep-dive RCA. Support high-severity (P1/P2) incidents and ensure timely resolution. Handle escalations from Tier-1/2 NOC for CS/IMS nodes (MSC/MSC-S, MGW, HLR/HSS, STP, MTAS, CSCF, SBG, ENUM, DRA, IBCF/TrGW). Handle SIP registration issues, VoLTE attach failures, IMS bearer issues, and interworking problems. Optimize VoLTE/IMS call flows, QoS, and media negotiation. CS Core Expert Support legacy CS Core elements: MSC, MSC-S, MGW, HLR, STP, VLR Resolve circuit-switched issues (2G/3G call setup, supplementary services, roaming failures). Disclaimer: This job posting has been aggregated from external source. Role details, content, and availability are subject to change. Applicants are advised to confirm the latest information directly on the company website before applying.
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