By Syngress, Wayne Lawson
What's AVVID? formerly known as Configuring Cisco Communications Networks (CCN), structure for Voice, Video, and built-in info (AVVID) is the newest improvement from Cisco platforms that would quickly redefine the best way companies speak. AVVID permits companies to transmit voice, facts, and video over one mixed structure, while some time past, 3 separate structures have been required. Configuring Cisco AVVID may be the first e-book to debate the elements of the AVVID structure and may be timed to unlock with the release of the expertise in early 2000. a pragmatic consultant to the AVVID know-how this publication will contain an advent to AVVID, and its software program, undefined, community structure, deploy, operation and configuration. issues comprise CallManager, Cisco Gateways, and IPCC (Cisco IP touch Center). * the 1st booklet to debate the parts of this significant new know-how * sensible consultant; many engineers will locate this a good resource of AVVID product wisdom * Cisco is making plans to release AVVID and software program in Spring 2000 - call for is already excessive for info * ebook can be timed to liberate with know-how
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One of Cisco’s core technologies introduced in the first-generation phones is efficient use of network resources. For example, if neither person in a conversation is talking, no data is sent. To give the users the feel that the conversation is continuing and to sound less like a radio, however, Cisco deploys a comfort noise-generation technique that is enabled and disabled though voice activity detection (VAD) programming. 323 protocol. com 94_AVVID_02 1/16/01 12:52 PM Page 21 An Overview of AVVID Hardware Solutions • Chapter 2 21 The first-generation IP telephone defines primary two sets—the 30 VIP and the 12 series, which both require the use of external power supplies.
There are some expenses that need to be addressed. If a company is looking to implement an infrastructure from the ground up, it is definitely cost-justifiable to implement a completely converged system. However, in a scenario where an existing (legacy) voice network, video system, and data infrastructure is in place, a migration approach is usually needed. Cisco has developed a phased approach that can and should be followed when converting to a converged infrastructure. Briefly, we’ll take a look at the three stages that can be used when implementing an AVVID infrastructure.
Once an image is selected for its functionality, it is loaded either by Trivial File Transfer Protocol (TFTP) or via a very slow serial upload through the console port. When the router is then booted, it will decompress the image and load the router IOS software image program into RAM. The IOS program will then enable interfaces, load configurations, routing tables, and so forth. As with flash memory, there really is no true test to say how much memory should be used. Unlike Microsoft Windows, which has the ability to write to a swap file on a hard drive, thus extending its physical memory into virtual memory, a Cisco router either will have the memory to carry out its functions or will report failures.