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PMG5318-B20A User’s Guide
81
C
H A P T E R
9
Voice
9.1 Introduction
This chapter provides background information on VoIP and SIP and explains how to configure your
device’s voice settings.
VoIP is the sending of voice signals over 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.
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 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.
SIP Identities
A SIP account uses an identity (sometimes referred to as a SIP address). A complete SIP identity is
called a SIP URI (Uniform Resource Identifier). A SIP account's URI identifies the SIP account in a
way similar to the way an e-mail address identifies an e-mail account. The format of a SIP identity
is SIP-Number@SIP-Service-Domain.
SIP Number
The SIP number is the part of the SIP URI that comes before the “@” symbol. A SIP number can
use letters like in an e-mail address ([email protected] for example) or numbers like a
telephone number ([email protected] for example).
Содержание PMG5318-B20A
Страница 8: ...Table of Contents PMG5318 B20A User s Guide 8 ...
Страница 14: ...Chapter 1 Introduction PMG5318 B20A User s Guide 14 ...
Страница 20: ...Chapter 2 The Web Configurator PMG5318 B20A User s Guide 20 ...
Страница 44: ...Chapter 5 LAN PMG5318 B20A User s Guide 44 ...
Страница 70: ...Chapter 6 Wireless LAN PMG5318 B20A User s Guide 70 ...
Страница 80: ...Chapter 8 Quality of Service QoS PMG5318 B20A User s Guide 80 ...
Страница 96: ...Chapter 10 Phone Usage PMG5318 B20A User s Guide 96 ...
Страница 102: ...Chapter 11 USB Services PMG5318 B20A User s Guide 102 ...
Страница 117: ...Chapter 12 Remote Management PMG5318 B20A User s Guide 117 ...
Страница 118: ...Chapter 12 Remote Management PMG5318 B20A User s Guide 118 ...
Страница 122: ...Chapter 13 Static Route PMG5318 B20A User s Guide 122 ...
Страница 126: ...Chapter 14 Dynamic DNS PMG5318 B20A User s Guide 126 ...
Страница 144: ...Chapter 17 Logs PMG5318 B20A User s Guide 144 ...
Страница 150: ...Chapter 19 Diagnostic PMG5318 B20A User s Guide 150 ...
Страница 164: ...Appendix B Legal Information PMG5318 B20A User s Guide 164 ...