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Author
Dennis J. Hartmann
Contract Instructor
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Global Knowledge
Dennis Hartmann is a Global Knowledge contract instructor who provides consulting services through his company, White Pine Communications. Dennis Hartmann was first exposed to Cisco Call Manager in the 2.0 time frame while working at a Fortune 500 financial company. He has been providing training and consulting services around Call Manager since 2001 (Call Manager 3.0). Dennis has been working in the field of voice and data communications for over ten years. During that time, he has earned various certifications: CCIE# 15651, CCVP, CCSI, CCIP, CCNP , CCDP, IP Telephony Express Specialist, Unified Communications Specialist, IP Telephony Design Specialist, Optical Qualified Specialist, and MCSE.
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