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None Los Angeles to San Jose 8 ms. 18 ms. 10 ms. none San Jose to Seattle 26 ms. 120 ms. 94 ms. none Seattle to San Jose 26 ms. 102 ms. 76 ms. none Determining Voice Bandwidth Requirements Voice bandwidth requirements depend on a number of parameters, including the sampling rate, codec, link type, header compression techniques, and the number of simultaneous voice calls. This section identifies voice bandwidth requirements for WAN links. The most important issue is the number of simultaneous calls that are permitted across the WAN link.

1 Chapter 3 Planning the IP Telephony Network IP Telephony Availability Requirements User Error and Process User error and process are major contributors to non-availability. The Gartner Group maintains that approximately 40% of all availability issues are user error and process related. To achieve higher levels of availability, higher levels of expertise and processes are needed to manage the network. There are four goals of network management processes: • Fault or problem detection and speedy resolution • Proactive problem identification and resolution before fault condition occurs • Consistent modular, hierarchical architecture with consistent versions and configuration • Successful migration to new solutions and technologies To achieve these goals, a large organization needs well-defined processes associated with the planning, design implementation, and operation of the network.

None Los Angeles to San Jose 8 ms. 18 ms. 10 ms. none San Jose to Seattle 26 ms. 120 ms. 94 ms. none Seattle to San Jose 26 ms. 102 ms. 76 ms. none Determining Voice Bandwidth Requirements Voice bandwidth requirements depend on a number of parameters, including the sampling rate, codec, link type, header compression techniques, and the number of simultaneous voice calls. This section identifies voice bandwidth requirements for WAN links. The most important issue is the number of simultaneous calls that are permitted across the WAN link.

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