Overview
Issue 3.4.1 June 2005
277
IP Telephony network engineering overview
In the early days of local area networking, network designers used hubs to attach servers and
workstations, and routers to segment the network into manageable pieces. Because of the high
cost of router interfaces and the inherent limitations of shared-media hubs, network design was
generally well done. In recent years, with the rise of switches to segment networks, designers
were able to hide certain faults in their networks and still get good performance. As a result,
network design was often less than optimal. IP Telephony places new demands on the network.
Suboptimal design cannot cope with these demands. Even with switches installed, a company
must follow industry best practices to have a properly functioning voice network. Because most
users do not tolerate poor voice quality, administrators should implement a well-designed
network before they begin IP Telephony pilot programs or deployments.
This section contains network design recommendations in the following topics:
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Overview
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Voice quality
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Best practices
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Common issues
Overview
Industry best practices dictate that a network be designed with consideration of the following
factors:
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Reliability and redundancy
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Scalability
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Manageability
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Bandwidth
Voice mandates consideration of the following additional factors when designing a network:
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Delay
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Jitter
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Loss
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Duplex
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 ...