Jim Hayes

Fiber Optics Columnist and Freelance Writer

HAYES is a VDV writer and trainer and the president of The Fiber Optic Association. Find him at www.JimHayes.com.

Articles by Jim Hayes

June 2002
Fiber optics is full of jargon but it’s important to understand it. One of the more confusing terms to many is “wavelength.” It sounds very scientific, but it is simply the term used to define what we think of as the color of light. READ MORE
May 2002
Regarding safety in fiber optic installations, the first thing that comes to mind is usually eye damage from laser light in the fiber. People imagine a laser burning holes in metal or perhaps burning off warts. While these images may be real for their applications, they have little relevance to most fiber optic communications. Eye safety is an issue, but usually it’s not with light in the fiber. READ MORE
April 2002
It may seem unbelievable, but fiber optic links and networks have been used for over 20 years. The first telco networks were installed in the late 1970s and data links were already in use by 1980, when there were few personal computers (PCs) and computer networks. READ MORE
March 2002
After a fiber optic cable plant is installed, it may be used with several different types of fiber optic networks. Computer networks, telephone signals, video links, and even audio can be sent on the installed fibers. Each network type has a performance requirement for the fiber optic cable link. READ MORE
February 2002
There are many instances where converting from copper to fiber is necessary or more cost-effective. Sometimes it’s done just to showcase new technology. But whatever the reason, making the conversion has become simple and inexpensive. Converting to fiber is sometimes the only technical solution. READ MORE
We questioned your knowledge of cabling testers last month, so now let’s see how well you know how to troubleshoot problems with those testers. Correct answers and explanations are in red. 1. If a copper certification tester fails an unshielded twisted-pair (UTP) cable, what is the most likely problem? A. Cable is too long B. Too much attenuation C. Alien crosstalkD. READ MORE