ZyXEL Communications MAX-306, Руководство пользователя, Страница: 147 / 405

User’s Guide
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H A P T E R
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The Service Configuration
Screens
12.1 Overview
The VOICE > Service Configuration screens allow you to set up your voice
accounts and configure your 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.
12.1.1 What You Can Do in This Chapter
• The SIP Settings screen ( Section 12.2 on page 149 ) lets you setup and
maintain your SIP account(s) in the WiMAX Device.
• The Advanced SIP Settings screen ( Section 12.2.1 on page 151 ) lets you set
up and maintain advanced settings for each SIP account
• The QoS screen ( Section 12.3 on page 158 ) lets you set up and maintain ToS
and VLAN settings for the WiMAX Device.
12.1.2 What You Need to Know
The following terms and concepts may help as you read through this chapter.
SIP
The Session Initiation Protocol (SIP) is an application-layer control (signaling)
protocol that handles the setting up, altering and tearing down of voice and