Expert knowledge in Cisco CallManager , Gateways [MGCP, SIP, H323], Gatekeepers, Cube, IPT Designing and Implementation of Cisco VOIP infrastructure Troubleshoot issues related to Cisco IPT, PRI, call drops, unable to make/receive calls and fax, configuration issues, dbreplication, core dumps and crashes, high CPU utilization, by analyzing CUCM traces/logs and Gateway debugs. Implement and support VOIP infrastructure