The Voip General Screens; Voip Overview; What You Can Do In This Chapter; What You Need To Know - ZyXEL Communications MAX218M2W User Manual

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The VoIP General Screens

9.1 VoIP Overview

The VOICE > General screens allow you to set up global SIP and Quality of
Service (QoS) settings.
VoIP (Voice over IP) is the sending of voice signals over the Internet Protocol. This
allows you to make phone calls and send faxes over the Internet at a fraction of
the cost of using the traditional circuit-switched telephone network. You can also
use servers to run telephone service applications like PBX services and voice mail.
Internet Telephony Service Provider (ITSP) companies provide VoIP service. A
company could alternatively set up an IP-PBX and provide it's own VoIP service.
Circuit-switched telephone networks require 64 kilobits per second (kbps) in each
direction to handle a telephone call. VoIP can use advanced voice coding
techniques with compression to reduce the required bandwidth.

9.1.1 What You Can Do in This Chapter

• The Media screen
global VoIP settings on the MAX208M2W Series.
• The QoS screen
settings for voice traffic flowing through the MAX208M2W Series.

9.1.2 What You Need to Know

The following terms and concepts may help as you read through this chapter.
Voice Coding
A codec (coder/decoder) codes analog voice signals into digital signals and
decodes the digital signals back into voice signals. The MAX208M2W Series
supports the following codecs.

MAX208M2W Series User's Guide

(Section 9.2 on page
(Section 9.2 on page 135) lets you set up and maintain QoS
135) lets you set up and maintain
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133