Voice over IP First-Step by Kevin Wallace
Cisco Press | Dec 17 2005 | ISBN: 1587201569 | Pages: 336 | CHM | 3.85 MB
Welcome to the world of voice over IP. We use either a telephone or e-mail for much of our day-to-day communication. Today, these two worlds are merging, and companies can place phone calls over their existing data network infrastructures using a technology called voice over IP (VoIP).