Jeff Hewett is a technical leader at Cisco Systems and is currently working in voice over IP software development. Having been involved with SS7 for more than 16 years, Jeff has worked in SS7 software development, testing, and training. He is a patent holder in SS7-related software development and has written about SS7 in popular journals. He has provided a broad range of SS7 training for Regional Bell Operating Companies, independent operators, and telecommunications vendors, dating back to the initial rollout of SS7 in the U.S. network. In more recent years, Jeff has been involved with voice over packet solutions as an engineer in the Cisco Networked Solutions Integration Test Engineering (NSITE) lab.