Transcription of Network Infrastructure - Cisco
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Network Infrastructure - Cisco
CHAPTER3-1 Cisco Unified CallManager Express Solution Reference Network Design GuideOL-10621-013 Network InfrastructureThis chapter describes the requirements of the Network Infrastructure needed to build an IP telephony system in an enterprise environment. Figure 3-1 illustrates the roles of the various devices that form the Network Infrastructure of a large-scale enterprise Network , and Ta b l e 3 -1 summarizes the features required to support each of these telephony places strict requirements on IP packet loss, packet delay, and delay variation (or jitter). Therefore, you need to enable most of the Quality of Service (QoS) mechanisms available on Cisco switches and routers throughout the Network .
Attendant consoles can be a Cisco Unified IP Phone 7960 with one or two Cisco Unified IP Phone 7914s providing a total of 34 extensions that can be monitored. Attendant consoles can also be software based consoles from Cisco-certified third-party vendors.
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