The next slides graphically illustrate the migration from traditional circuit-switched voice networking to the new packet-switched integrated data/voice/video networking. Here you see two offices… one in Vancouver and…

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A voice-capable router can replace a Private Line, Automatic Ringdown (PLAR) service from a telephone service provider. In the example, a user takes the phone off-hook, causing another…

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Integrated voice and data networks support a variety of applications, all of which are designed to replace leased lines and lower costs. Each of the applications listed above…

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Asynchronous Transfer Mode (ATM) is a technology that can transmit voice, video, data, and graphics across LANs, metropolitan-area networks (MANs), and WANs. ATM is an international standard defined…

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Voice over Frame Relay (VoFR) technology consolidates voice and voice-band data (including fax and analog modems) with data services over a Frame Relay network. The VoFR standard is…

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VoIP works with a company’s existing telephony architecture, including its private branch exchanges (PBXs) and analog phones. VoIP and H.323 enables companies to complete office-to-office telephone and fax…

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The Voice over IP standard incorporates other components, including:   – G. standards, which specify analog-to-digital conversion and compression (as described earlier in this chapter).   – H.323 standard, which specifies call…

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We’ve covered the building blocks for voice/data integration. Now, let’s take a look at the different transports customers can consider. The most widely used is Voice over IP….

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The advantages of reduced cost and bandwidth savings of carrying voice over packet networks are associated with some quality of service issues that are unique to packet networks….

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What makes voice compression possible is the power of Digital Signal Processors. DSPs have continued to increase in performance and decrease in price over time, and as they…

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