Knowledge on core switch  in IMS (HSS, CSCF, ATS & CCF) , Huawei NGN SoftX 3000 and MGW 8900. NOKIA IMS Handling 24/7 shift operation for Monitoring, Network fault management and .maintaining performance. Strong command in switch routing, charging concept. Capability on upgrade/downgrade of IMS & NGN switches. Knowledge of Switching System Call processing. Knowledge of MNP STP configurations and LRN Routing details. Knowledge in SBC SE2900 ,  SE2600, SIP protocols & MRS Etc. Knowledge in Operation and Maintenance of Access Network like MSAN and FTTH (Huawei, Nokia, ZTE).  Experience in call traffic analyzing and traces using trace analyzer. Ensuring backup of Core switches, access nodes. CDR copying process and mediation coordination. Maintaining SLA for service assurance and service delivery. Maintaining Performance  and regulatory repots  for voice Network Handling emergency situation and vendor coordination. Maintain Inventories of Core & Access Equipment’s.