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Colin Yao 
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Colin Yao's Communications Articles

A Brief Introduction to Communication Systems

(October 22, 2008)  The original telecommunication system was developed for PSTN (Public Switch Telephone Network) for voice communications. But now communication networks include all types of voice, video and data communication over copper wire, optical fibers and wireless medium. With the inception of Internet, ..

Fiber Optic LAN Network Backbone 101

(October 22, 2008)  The intrabuilding backbone connects the main cross-connect in the building to each of the other cross-connects. An optical fiber intrabuilding backbone has emerged as the medium of choice due to its ability to support multiple high-speed networks in a smaller cable without crosstalk concerns. Also .

What Are Optical Fiber Amplifiers And How Do They Work?

(May 07, 2008)  Why do we need optical fiber amplifiers? Basically what the optical fiber amplifiers solve is the traditional distance problem as in any long distance telecommunication system such as a trans-Atlantic link. As optical signals travel through the fiber, the signals become weaker in power. The farther .

What Are Telephone Metro Networks?

(March 24, 2008)  Metro networks link local switching central offices in a large metropolitan area. In these days, two types of metro networks exist: ones that have grown from traditional telephone networks and ones that have been built by nontraditional telecoms companies for different plans. Central offices, also .


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