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IP Telephony Configuration Guide

Chapter 1

Introduction

IP Telephony provides the flexibility, affordability, and expandability of the Internet to the world

of voice communications.

This section includes an overview of the components that make up the Business Communications

Manager version 3.0 IP telephony and Voice over IP (VoIP) features:

• “IP telephones and VoIP trunks” on page 20

• “Creating the IP telephony network” on page 21

• “Key IP telephony concepts” on page 25

Business Communications Manager 3.0 with voice over IP (VoIP) provides several critical

advantages:

• Cost Savings. IP networks can be significantly less expensive to operate and maintain than

traditional networks. The simplified network infrastructure of an Internet Telephony solution

cuts costs by connecting IP telephones over your LAN and eliminates the need for dual

cabling. Internet Telephony can also eliminate toll charges on site-to-site calls by using your

existing WAN. By using the extra bandwidth on your WAN for IP Telephony, you leverage

the untapped capabilities of your data infrastructure to maximize the return on your current

network investment.

• Portability and flexibility. Employees can be more productive because they are no longer

confined by geographic location. IP telephones work anywhere on the network, even over a

remote connection. With Nortel Networks wireless e-mobility solutions, your phone, laptop,

or scanner can work anywhere on the network where a an 802.11b access point is installed.

Network deployments and reconfigurations are simplified, and service can be extended to

remote sites and home offices over cost-effective IP links.

• Simplicity and consistency. A common approach to service deployment allows further

cost-savings from the use of common management tools, resource directories, flow-through

provisioning, and a consistent approach to network security. As well, customers can centrally

manage a host of multimedia services and business-building applications via a Web-based

browser. The ability to network existing PBXs using IP can bring new benefits to your

business. For example, the ability to consolidate voice mail onto a single system, or to fewer

systems, makes it easier for voice mail users to network.

• Compatibility. Internet telephony is supported over a wide variety of transport technologies.

A user can gain access to just about any business system through an analog line, Digital

Subscriber Line (DSL), a LAN, frame relay, asynchronous transfer mode, SONET, or wireless

connection.

• Scalability. A future-proof, flexible, and safe solution, combined with high reliability, allows

your company to focus on customer needs, not network problems. Nortel Networks internet

telephony solutions offer hybrid environments that leverage existing investments in Meridian

and Norstar systems.

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Avaya IP Telephony Guía de configuración Pagina 19