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1 comment… read it below or add one
First, study the existing telephone network...the way how it bringing changes in lifestyle.
Second, study the data network ( Internet and Intranet )...
Third, have glance at deployed VOIP networks from major telecoms.
Four, get product knoweldge from vendors like http://www.cisco.com, you can download plenty of powerpoint presentations and case studies there.
FINAL.. Make your own presentations with powerpoint or flash.