The number of worldwide VoIP customers is well over 38 million. Thanks to the popularity of inexpensive, high-quality services, it's projected to increase to ne

"A system administrator's guide to VoIP technologies"--Cover.

Communications represent a strategic sector for privacy protection and for personal, company, national and international security. The interception, damage or l

Certification study guide and companion reference textbook for the TCO Certified VoIP Analyst (CVA) courses and exams. The CVA Study Guide corresponds directly

The widespread use of information and communications technology (ICT) has created a global platform for the exchange of ideas, goods and services, the benefits