Engineer - Voice Core Network

Job SummaryResponsible for monitoring, maintaining, troubleshooting, and optimizing the Voice Core Network to ensure high network availability, call quality, and uninterrupted voice services for Airtel customers.Key ResponsibilitiesMonitor and maintain voice core network elements and associated telecom infrastructure.Troubleshoot voice call failures, call drops, call setup issues, and other service-related problems.Work on core network technologies such as MSC, MGW, IMS, SBC, and related signaling systems, depending on the network environment.Support VoLTE, VoIP, SIP, and SS7 signaling-related activities.Analyze network alarms, KPIs, call traces, and performance reports to identify faults and service degradation.Coordinate with transmission, IP, RAN, NOC, and vendor teams for end-to-end fault resolution.Perform incident management, root cause analysis (RCA), and preventive maintenance.Support planned network changes, software upgrades, configuration changes, and network expansion activities.Ensure adherence to network availability targets, operational SLAs, and quality standards.Prepare daily reports, incident reports, and technical documentation.Participate in rotational shifts and on-call support, if required.