7:34

What is VoIP?

1:01:21

Introduction to Voice Over IP

13:04

Introduction to Voice over IP (Part 1)

22:29

Telecommunications Basics Part 1

10:18

VoIP and SIP What are they?

13:56

How an IP Phone Works!

18:51

SIP Trunking Explained

21:35

Telecommunications Basics Part 3