Found this great comparison between this two popular VoIP protocols. This is a great resource to fully understand each other, by doing a comparison. Credit given to “Packetizer“.

Reference: http://www.packetizer.com/ipmc/h323_vs_sip/

While studying for the CVOICEv5 exam I found this old Cisco “Voice Internetworking – Introduction” tutorial site that I found useful.  You’ll find lectures on traditional telephony and other basic information that will be useful to fully understand how telephony and demystify all those terms. Here are the contents:

Chapter 1: Introduction to Basic Analog Voice Over IP
- History of Telephony
- Understanding Telephone Network Basics
- Understanding Telephony
- Understanding Voice over IP
- Configuration of Basic Analog VoIP
- Troubleshooting and Monitoring Basic Analog VoIP

Chapter 2:  Analog Voice Internetworking with E&M
- Understanding Basic VoIP with PBX Trunking
- Configuration of VoIP with E&M Signaling
- Troubleshooting Basic VoIP with PBX Trunking

Chapter 3: Basic Analog-to-Digital Voice Over IP
- Introduction to Digital Voice Over IP
- Configuring Digital Voice over IP
- Troubleshooting and Monitoring Digital Voice over IP

Chapter 4: Interactive Voice Response
- Overview and Objectives
- Understanding and Configuring Interactive Voice Response
- Troubleshooting and Monitoring Interactive Voice Response

“Whenever you are asked if you can do a job, tell ‘em, ‘Certainly I can!’ Then get busy and find out how to do it.”
-Theodore Roosevelt (1858-1919)