The two areas in which the most hand waving has been done are the ability to provide a quality telephone product over the best-effort Internet and the possibility that providing telephone service over IP might be economically feasible.

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Users download the free application off the Web, but instead of typing a text message, they use a headset, telephone or microphone and speakers to make a high-quality, two-way voice call to anyone else running the application.

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Vinho verde producers were also famous for forcing their vines to grow high off the ground, allowing more grapes to grow at the expense of the quality, using anything from trees to fences to telephone poles.

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Mobile carriers now have the ability to improve sound quality by transmitting it over their 4G LTE networks, as opposed to the more limited telephone lines of the past.

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And if you've ever wanted to seriously used a Wi-Fi network to make voice telephone calls using Voice Over Internet Protocol technology (VOIP), your network will need a feature called QOS or Quality Of Service.

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