Specifications

iii
Cisco 1751 Router Software Configuration Guide
OL-1070-01
CONTENTS
About This Guide xi
Objectives
xi
Audience xi
Cisco IOS Software Documentation xi
Organization xiv
Command Syntax Conventions xiv
Cisco Connection Online xv
Documentation Feedback xv
CHAPTER 1 Voice over IP Overview 1-1
Voice Primer 1-1
How VoIP Processes a Typical Telephone Call 1-2
Numbering Scheme 1-2
Analog Compared with Digital 1-3
CODECs 1-3
Mean Opinion Score 1-3
Delay 1-4
Jitter 1-5
End-to-End Delay 1-5
Echo 1-5
Signaling 1-6