New PDF release: Authorized self-study guide: Cisco Voice over IP

By Kevin Wallace

ISBN-10: 1587055546

ISBN-13: 9781587055546

I've got my ccnp and ccna instant, so i have been via 6 different ciscopress books. althoug this ccvp publication is fine, it rambles over an analogous matters means too lengthy. i will not comprehend if it is on the right track for the try until eventually i take the try out, yet to this point it sort of feels mediocre in comparison to the opposite ciscopress books i have received.

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The IP WAN also carries call control signaling between central and remote sites. Figure 1-26 illustrates a typical centralized call processing deployment, with a UCM cluster as the call processing agent at the central site and an IP WAN with QoS enabled to connect all the sites. The remote sites rely on the centralized UCM cluster to handle their call processing. Applications such as voice mail and IVR systems are typically centralized as well to reduce the overall costs of administration and maintenance.

There is no dependency for service in the event of an IP WAN failure or insufficient bandwidth, and there is no loss of call processing service or functionality. 37 38 Authorized Self-Study Guide: Cisco Voice over IP (CVOICE) The main benefits of the single-site model are the following: ■ Ease of deployment. ■ A common infrastructure for a converged solution. ■ Simplified dial plan. ■ No transcoding resources are required because of the use of a single high-bandwidth codec. Design Guidelines for Single-Site Deployment Single-site deployment is a subset of the distributed and centralized call-processing model.

RTCP is used for QoS reporting. It gathers statistics on a media connection and information such as bytes sent, packets sent, lost packets, jitter, feedback, and round-trip delay. Applications use this information to increase the quality of service, perhaps using a lowcompression codec instead of a high-compression codec. There are several types of RTCP packets: Sender Report Packet, Receiver Report Packet, Source Description RTCP Packet, Goodbye RTCP Packet, and application-specific RTCP packets.

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Authorized self-study guide: Cisco Voice over IP by Kevin Wallace


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