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SNHU - IT-340 Network and Telecommunication Management
Written by: Chris Bell - September, 2013

Multiplexing Schemes by Information Technology Professional



An Information Technology professional that works with multiplexing schemes will have to fix and work with space, frequency, time and code divisions. The idea is to have signals group together and travel through one wire instead of each signal having their own wire and that will save time and labor of installing a wire for each and every signal. The concept of allocation and distribution works in many areas of business to save the company time and money. Imagine a group of packages that are being shipped from the east coast to the west coast for example. Instead of sending them all individually they will be grouped together to travel on the same plane and then distributed from that point. If you want to travel to Florida are you going to take a private plane for yourself or are you going to group together with a few hundred people to share the costs?

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IT professionals will have to troubleshoot multiplexing schemes that share a medium. The "medium" is the plane that we all share to Florida. The signals are funneled into the medium to travel the necessary distance and then it reverts back onto the channel it left. The main benefit is that less copper wire is needed, less installation charges and less confusion. Believe it or not, they actually have better connections as well, when it comes to static and noise over long distances. The IT professional will need to figure out what type of connection it is and, at that point, they can begin the diagnosis.

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Frequency division multiplexing is common in radios because each station has its own frequency that the radio can choose from. The frequency will be running all day long and each radio has the option of choosing a single station to listen to. The main disadvantage is that the abundance of frequencies is a waste of resources.

Time division multiplexing means that all senders use the same frequency to save resources. All of the senders talk at different times because they can't send the signal through at the same time. That just means that the person listening must listen at exactly the right time.

Code division multiplexing increased the security of lines getting tapped into so many government agencies started using it right away. The security features were better because it was much harder to listen to a line when multiple channels use the same spectrum. Code division multiplexing is also the best option for those that want to hear less interference, static or noise.

Technology improves so quickly that something new comes out before the first "new thing" got the word out. There are many different ways that devices are connected and IT professionals need to have a clear understanding of how to troubleshoot each type. Each division seems to have its advantages and disadvantages that make them unique but, multiplexing overall, has helped with common issues that we all have experienced such as static and interference.

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References:


D. J. Richardson (April 2013). Space-Division Multiplexing Over Optical Fibres. Retrieved from:
http://www.nature.com/nphoton/journal/v7/n5/full/nphoton.2013.94.html
Educational PDF. Multiplexing. Retrieved from:
http://www.cs.sunysb.edu/~jgao/CSE370-spring06/lecture3.pdf