Switching to VoIP

This is the Title of the Book, eMatter Edition

Copyright © 2007 O’Reilly & Associates, Inc. All rights reserved.

Voice QoS on Windows

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Residential and Small-Office VoIP Routers

A new breed of residential gateway routers has begun to appear on the scene: rout-

ers with a built-in SIP or SCCP client and one or more analog RJ11 telephone con-

nections. These devices enable routing and firewalling of Internet traffic, as well as

ATA-type functionality so the connect analog phone(s) can make and receive VoIP

calls over the Internet.

Inside the router’s firmware, a SIP proxy and IP precedence measures may even exist,

so groups of IP phones can be used to dial voice calls over the Internet. Some of these

routers even offer to route calls over a local analog PSTN phone line if the Internet

service fails. Check the specs to see what your VoIP router is capable of.

A newer breed of broadband router has gained popularity recently.

The IAD, or integrated access device, is a combination router and data

link interface (i.e., DSL or cable modem).

Most recently, IADs like the Zoom X5 series have begun to add VoIP

capabilities and can even support QoS and analog phones. If you don’t

like clutter, consider using an IAD to connect your residence or small

office. For more information about how these devices improve remote

site survivability, read Chapter 13.

Voice QoS on Windows

Windows XP and 2003 can be used as routers ...