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I'm currently taking a Cisco Networking class, and it has an online component at cisco.netacad.net. The section of this article talking about Walson being the first cable operator to use microwaves and improved picture quality appears to be copied from one of the sections of the course, although I suppose it's possible Cisco copied the article. I'm attaching a screen shot of the relevant section from the online component. Screenshot of Cisco's page.
