User`s guide

User’s Guide
111
CHAPTER 11
The Service Configuration
Screens
11.1 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.
11.1.1 What You Can Do in This Chapter
•The SIP Settings screen (
Section 11.2 on page 113) lets you setup and maintain your SIP
account(s) in the WiMAX Modem.
•The Advanced SIP Settings screen (
Section 11.2.1 on page 114) lets you set up and
maintain advanced settings for each SIP account
•The QoS screen (
Section 11.3 on page 120) lets you set up and maintain ToS and VLAN
settings for the WiMAX Modem.
11.1.2 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 multimedia sessions over the
Internet. SIP signaling is separate from the media for which it handles sessions. The media that
is exchanged during the session can use a different path from that of the signaling. SIP handles
telephone calls and can interface with traditional circuit-switched telephone networks.