Voice Core Specialist
Current• Operation and maintenance of Nokia IMS equipment, as well as Ericsson IMS/NGN equipment, MSAN (HUAWEI, ZTE, Nokia).• Management of national TSS network traffic: SIP, H.248.• Migration of the legacy H.248 network to SIP.• Provisioning of RTC, ISDN, and VoIP GPON-FTTH customers.• Configuration of OLT/ONT (Huawei, Nokia, ZTE).• Management of Nokia DHCP-VoIP Pools.• Management of RTC and ADSL subscribers.• Administration and maintenance of Nokia IMS and Ericsson IMS/TSS Core nodes.• Analysis and troubleshooting of performance and service quality issues in the IMS environment.• Proactive monitoring of the IMS infrastructure to ensure service availability and reliability.• Management of preventive and corrective maintenance for IMS/TSS infrastructures.• Preparation of reports and operational updates.• Supervision of alarms on IMS/TSS nodes.• SIP call tracing and troubleshooting.• Backup management.• Handling of customer complaints (fixed-line) and provisioning issues.