The ideal way to build a national broadband network for access to the Internet would be with a high-bandwidth, bidirectional cable running to each individual household. But sometimes you have to work with what you've got, and in America, what we have are cable TV networks. These networks have the bandwidth, but not the bi-directional part—they weren’t originally intended for two-way communication. Worse, the cables for many neighbors all connect together, so it's not possible to send a signal to just one household. And yet, cable companies manage to provide 100 Mbps bandwidth to their broadband customers using this flawed infrastructure, and they do it without compromising the preexisting cable TV service. The tech behind this magic trick goes by the name of DOCSIS, which stands for Data Over Cable Service Interface Specifications.
In this two-part series, we'll take a detailed look at DOCSIS—what it is and how it evolved. If you've ever wondered how cable TV companies manage to get progressively more bandwidth out of the same old cable lines, then this series is for you.
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I just heard this from the cable guy in one of the cable companies in my area. He shared, Ukrainian cable operator Volia plans to extend its DOCSIS 3.0-based high-speed internet service to the cities of Lviv, Donetsk and Sevastopol next year, following its launch in the country’s capital Kyiv. Also, they are preparing for the launch of 200Mbps-plus services in the capital, and the launch of digital TV services in three or four additional cities. That's how he showed me how DOCSIS works.
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