CECS 474 Computer Network Interoperability Notes for Douglas E. Comer, Computer Networks and Internets (5 th Edition) Tracy Bradley Maples, Ph.D. Computer.
CHAPTER I+2 Overview of the PSTN and Comparisons to Voice over IP Enterprise Telephony Today.
National Communications System Dan Currie Eastern Regional Outreach Coordinator GETS/WPS Program Phone: 215-343-8767 [email protected] [email protected].
Voice of IP Fundamentals
