Cisco AVVID and IP Telephony Design and Implementation by Syngress, Martin Walshaw, Sean Thurston, Jeff Bankston

By Syngress, Martin Walshaw, Sean Thurston, Jeff Bankston

Company call for for AVVID strategies is speedily expanding - engineers will desire this publication Cisco AVVID (Architecture for Voice, Video and built-in Data), the newest improvement from Cisco structures, is redefining the way in which companies converse. AVVID permits companies to transmit voice, info, and video over a unmarried built-in structure known as a "multiservice" or "converged" community. Cisco AVVID layout & Implementation is designed to be an entire desk-reference for community directors and engineers chargeable for a classy AVVID community. protecting historical past, protocols, undefined, servers, switches, bridges, routers, and discussions approximately implementation matters, realities of fee, requisites and community barriers. Engineers will how to layout and construct a entire Cisco AVVID community infrastructure. Follows on from the winning Configuring Cisco AVVID Cisco engineers and different IT pros will locate this an fundamental advisor while imposing AVVID writer is structures Engineer at Cisco Unrivalled net help at solutions@syngress.com

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Voice designs are different in regards to both hierarchy and redundancy. First, the modern PBX is internally self-redundant, which means the physical box itself attempts to provide its own redundancy. Data networking systems have only recently reached this level of redundancy, and, typically, they still experience a short outage as the system changes from the primary to standby engine. com 5 109_AVVID_DI_01 6 10/9/01 2:15 PM Page 6 Chapter 1 • Old World Technologies physically redundant routers are actually one device.

Customer service and satisfaction will also benefit from this type of infrastructure. Instead of an end-user having to call the network group for one problem and the voice group for another, the user has a single point of contact for their communication needs. Toll bypass allows an organization to utilize its existing data infrastructure to make calls within the organization. Imagine a multinational organization with branch offices spread throughout the world. In the old-world solution, any time one office placed a call to another, the telephone systems of each office would employ the services of telecommunications service providers to place a call within their own organization.

You’re probably thinking this doesn’t make sense, but it does. com 109_AVVID_DI_01 10/9/01 2:15 PM Page 9 Old World Technologies • Chapter 1 happen if that path failed? This decision adds a dynamic to the typically static limitations of the PBX forwarding system. NOTE Most PBX phones are digitally connected to the PBX and do not send the actual DTMF tones from the phone to the switch. Traditional analog phones and some PBX phones will send the actual tones to be interpreted by the switch. However, the call routing is still based on the numbers pressed and received, and the non-Signaling System 7 (SS7) signaling is either proprietary or DTMF.

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