VPN
Issue 3.4.1 June 2005
307
For more information, see:
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IP Voice Quality Network Requirements Website
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IP Voice Quality Document (.PDF)
The following sections cover the topics:
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Convergence advantages
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Managing IP Telephony VPN issues
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Conclusion
Convergence advantages
For increasing numbers of enterprises, the VPN carries not only data, but voice
communications. Though voice communication over IP networks (IP Telephony) creates new
quality of service (QoS) and other challenges for network managers, there are compelling
reasons for moving forward with convergence over maintaining a traditional voice and data
infrastructure:
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A converged infrastructure makes it easier to deploy eBusiness applications, such as
customer care applications, that integrate voice, data, and video.
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Enterprises can reduce network costs by combining disparate network infrastructures, and
eliminating duplicate facilities.
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A converged infrastructure can increase the efficiencies of the IT organization.
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Long distance charges can be reduced by sending voice over IP networks.
Voice over IP VPN is emerging as a viable way to achieve these advantages. The emergence of
public and virtual private IP services promises to make it easier for customers, suppliers, and
businesses to use data networks to carry voice services. As with any powerful new technology,
however, VPNs require skilled management to achieve top performance. The highest network
performance becomes imperative when the VPN network must deliver high-quality voice
communication. Not all IP networks can meet these quality requirements today. For instance,
the public Internet is a transport option for voice communication only when reduced voice
performance is acceptable, and global reach has the highest priority. When high voice quality is
a requirement, ISPs and Network Service Providers (NSPs) can provide other VPN connections
that meet required Service Level Agreements (SLAs).
Managing IP Telephony VPN issues
This section provides information on:
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Communication security
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Firewall technologies
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Network management and outsourcing models
Summary of Contents for Application Solutions
Page 1: ...Avaya Application Solutions IP Telephony Deployment Guide 555 245 600 Issue 3 4 1 June 2005 ...
Page 20: ...About This Book 20 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 21: ...Issue 3 4 1 June 2005 21 Section 1 Avaya Application Solutions product guide ...
Page 22: ...22 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 106: ...Call processing 106 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 124: ...Avaya LAN switching products 124 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 139: ...Issue 3 4 1 June 2005 139 Section 2 Deploying IP Telephony ...
Page 140: ...140 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 186: ...Traffic engineering 186 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 204: ...Security 204 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 228: ...Avaya Integrated Management 228 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 274: ...Reliability and Recovery 274 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 275: ...Issue 3 4 1 June 2005 275 Section 3 Getting the IP network ready for telephony ...
Page 276: ...276 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 356: ...Network recovery 356 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 366: ...Network assessment offer 366 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 367: ...Issue 3 4 1 June 2005 367 Appendixes ...
Page 368: ...Appendixes 368 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 394: ...Access list 394 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 414: ...DHCP TFTP 414 Avaya Application Solutions IP Telephony Deployment Guide ...