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Paul Giralt, CCIE #4793, is an escalation engineer at the Cisco Systems Technical Assistance Center in Research Triangle Park, N.C., where he has worked since 1998. He has been troubleshooting complex IP Telephony networks since the release of CallManager 3.0 as a TAC engineer, a technical leader for the Enterprise Voice team, and now as an escalation engineer supporting the complete Cisco line of IP Telephony products. Paul has troubleshot problems in some of Cisco's largest IP Telephony deployments and has provided training for TAC teams around the globe. Prior to working on IP Telephony, he was a TAC engineer on the LAN Switching team. He holds a B.S. in computer engineering from the University of Miami.