Voice Core Mobile Operations

Preventive and corrective second level troubleshooting ensuring quality, continuity of service and the restoring time for Core IMS Network Elements. In collaboration with 1st Line Operations teams, work out procedures related to the analysis of alarms to detect and eliminate faults. Perform data configuration, software rollout and support integration activities with planning and delivery functions. With these activities you will have a great impact on our business: In case of incident assure trouble shooting analysis and all the repair actions, including vendor support escalation, to achieve service and performance restoration of Core Network. Perform proactive maintenance activities to prevent incidents and constantly optimize the network, e.g. Daily Walkthroughs and Health checks for Core IMS components. Assure planned work activities, network rollout, software upgrades and parameter changes in Core IMS network ensuring quality of service and avoiding regression on network functionalities. Introduce and manage cutting edge technologies including vendor and on the job training. Perform acceptance test and integration/configuration activities of new network elements of the Core CS network. Very good knowledge of core network principles for 2G/LTE technologies: MSS, MGW, SBC, CSCF, TAS, ENUM, VoLTE Good knowledge of core network protocols: SIGTRAN, ISUP, CAMEL, INAP SIP, Diameter, TCP/UDP, S1AP, GTP/GTPv2, MAP, BSSAP. Experience in trace analysis (Wireshark traces, Tektronix traces, network element traces); NFV Framework basics and knowledge of VNF context and technologies (virtualization layer, VIM, VNF Managers). University degree: faculty of Electronics, Telecommunications and Information Technology 1-2 years of experience in Core Network Operations and Maintenance activities Nokia core network trainings and certificates or equivalent