Download e-book for iPad: Cisco IP telephony: planning, design, implementation, by Ramesh Kaza

By Ramesh Kaza

ISBN-10: 1587051575

ISBN-13: 9781587051579

Cisco IP Telephony: making plans, layout, Implementation, and Operation of the IP Telephony community, is a advisor for community engineers as they wade through the deployment of a Cisco IP telephony (IPT) answer. even if an IPT approach brings a number of merits to a firm, knowing all of the elements of that procedure is critical for a profitable implementation. Engineers tasked with implementation should also remember that the structure they're fitting has to be scalable sooner or later. The authors of this publication, Ramesh Kaza and Salman Asadullah, have taken an method of tackle the questions that come to those engineers whereas making plans, designing, imposing, and working the Cisco IPT options. The deployment procedure has been divided into 4 stages: making plans, layout, Implementation, and Operation (PDIO). every one section offers particular information about the projects concerned and top practices for winning implementation of the IPT resolution.

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Additional info for Cisco IP telephony: planning, design, implementation, operation, and optimization

Example text

If the network that you are deploying is complex and involves multiple lines/directory numbers per IP phone or dial plan that includes numerous route patterns and translational patterns, you have to understand the concept of dial plan weights, as discussed in the following section. Dial Plan Weights Device weights determine the maximum number of physical devices that can be registered to a CallManager subscriber. Some IP phone models support multiple lines (directory numbers or line appearances).

Figure 1-9. RTP, UDP, and IP Protocol Headers [View full size image] 30 Part I: Overview of Technology, Protocols, and the PDIOO Methodology Part I: Overview of Technology, Protocols, and the PDIOO Methodology 31 IP Telephony Components So far this chapter has focused on analyzing how legacy networks are migrating to integrated voice and data networks and on describing the various protocols used in the new multiservice networks. This section discusses the main components of Cisco AVVID and some of the key areas to look for when deploying the Cisco IPT solution.

IP Phones respond with IP address and UDP port information to the CallManager. CallManager communicates to each phone about the other phone's IP address and UDP port number. After both phones receive the other phone's IP address and UDP port, they start the media exchange directly between them. 7. After the call is terminated by either phone, CallManager instructs the phone to tear down the RTP channel and updates the call state of the phones and the date and time on the IP phones. As the preceding steps demonstrate, all the instructions come from the CallManager.

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Cisco IP telephony: planning, design, implementation, operation, and optimization by Ramesh Kaza

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