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Voice Technology Basics

Welcome to the Voice Technology Basics lesson. Combined voice and data networks are definitely a hot topic these days. In this module, we’ll start by discussing the convergence of voice and data. We’ll present a bit of history as well so that you understand how this all came about.

We’ll then move into discussing actual voice technology. There’s a lot to cover here and a lot of vocabulary you’ll need to be familiar with. We’ll start with understanding the traditional telephony equipment. We’ll also discuss voice quality issues as well as enabling technologies such as compression that are making voice/data networks possible.

After we cover the technology, we’ll discuss Voice over IP, Voice over Frame Relay, and Voice over ATM. We’ll then cover some of the new applications that are possible on combined voice/data networks.
Finally, we’ll look at how a company might migrate from traditional telephony to an integrated voice/data network.

PBX Networking to New Voice Networking
Voice Technology Basics 0
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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Voice – Capable Route
Voice Technology Basics 0
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
Computer Network Tutorial
Applications of Integrated Voice and Data Networks
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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
Computer Network Tutorial
Voice over Asynchronous Transfer Mode (ATM)
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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
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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 – H.323 Interoperability
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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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Voice over IP Components
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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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Voice over Data Transports
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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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QoS in Voice Technology
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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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Voice Technologies Compression
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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
Computer Network Tutorial