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Author
Dennis Hartmann
Senior Unified Communications Instructor
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Global Knowledge
Dennis Hartmann, CCIE No. 15651, is a senior unified communications instructor at Global Knowledge and a consultant. Dennis is also the author of the Cisco Press book, Implementing Cisco Unified Communications Manager, Part 1 (CIPT1). Dennis has various certifications, including the Cisco CCVP, CCSI, CCNP, CCIP, and the Microsoft MCSE. Dennis has worked for various Fortune 500 companies, including AT&T, Sprint, Merrill Lynch, KPMG, and Cabletron Systems. Dennis lives with his wife and children in Hopewell Junction, New York.
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