By Ramesh Kaza
Cisco IP Telephony: making plans, layout, Implementation, and Operation of the IP Telephony community, is a consultant for community engineers as they wade through the deployment of a Cisco IP telephony (IPT) resolution. even supposing an IPT approach brings a number of merits to a company, knowing all of the parts of that process is important for a profitable implementation. Engineers tasked with implementation should also do not forget that the structure they're fitting has to be scalable sooner or later. The authors of this booklet, Ramesh Kaza and Salman Asadullah, have taken an method of tackle the questions that come to those engineers whereas making plans, designing, enforcing, and working the Cisco IPT options. The deployment procedure has been divided into 4 levels: making plans, layout, Implementation, and Operation (PDIO). each one part presents particular information about the initiatives concerned and most sensible practices for winning implementation of the IPT resolution.
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Extra resources for Cisco IP telephony: planning, design, implementation, operation, and optimization
In this step, CallManager also checks for the media capabilities of the phones, such as the codecs supported on each phone, and invokes the transcoder media resource device if both phones talk different codecs. If CallManager fails to invoke the transcoder device because no such device is configured, the users might experience one-way audio. 6. 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.
0. You have to deploy multiple CallManager clusters if the number of IP phones plus other devices exceeds the device weights limit supported by a single cluster. Tip In Table 1-2, the number provided in the Maximum Number of IP Phones per Server column is based on the assumption that all phones are configured with a single directory number. 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.
225 gateways. • It can perform basic call routing in addition to call admission control. You have two choices of deploying a gatekeeper with CAC: • Gatekeepers deployed with the Hot Standby Router Protocol (HSRP) • Gatekeeper clustering Gatekeepers in HSRP mode do not share the CAC information, whereas gatekeeper clustering enables true redundancy and load balancing. Gatekeepers that are deployed in a cluster mode exchange the CAC information via the gatekeeper Update Protocol (GUP) and are the recommended deployment method.