
17
IP Telephony Configuration Guide
Chapter 1
Introduction
IP Telephony provides the flexibility, affordability, and expandability of the Internet to the world
of voice communications.
Business Communications Manager 2.5 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 via global
four-digit dialing. And, 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 Nortel Networks 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 from a central point
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, making 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, 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.
• Increased customer satisfaction. Breakthrough e-business applications help deliver the
top-flight customer service that leads to success. By providing your customers with rapid
access to sales and support personnel via telephone, the Web, and e-mail, your business can
provide better customer service than ever before.
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