Gonzalo Salgueiro, CCIE No. 4541, is a senior escalation engineer supporting voice, fax and modem technologies at the Cisco Systems Technical Assistance Center in Research Triangle Park, North Carolina. Over the last 11 years at Cisco he has specialized in troubleshooting complex issues for some of the largest VoIP networks as well as providing technical leadership for some of the most critical worldwide voice and fax deployments. Prior to joining he Escalation Team in 1999 Gonzalo had roles as a TAC engineer for both the Access/Dial and Multiservice Voice teams as well as a team lead for the Access/Dial team. Gonzalo has developed and delivered all levels of training and documentation on these technologies both internally to Cisco technical teams and externally to Cisco customers worldwide. He holds a B.S. in Physics from Jacksonville University and an M.S. in Physics from the University of Miami.