Click to enlargeIntroduction to<br>Transmission Systems<a name="top">

Author: Lawrence Harte

Number of Pages: 52
Number of Diagrams: 23

This book explains many types of Transmission Systems including: plain old telephone service (POTS), digital signal level (DSx), integrated services digital network (ISDN), digital subscriber line (DSL), optical carrier (OCx), ISDN digital subscriber line (IDSL), integrated digital loop carrier (IDLC), in-band signaling, out-of-band signaling, virtual circuits, and repeaters. Transmission systems interconnect communication devices by guiding signal energy in a particular direction or directions through a transmission medium such as copper, air, or glass. Described are the key types of more....

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Sample Diagrams

There are 23 explanatory diagrams in this book

Line Resistance Attenuation

This figure shows how line resistance attenuation and the wire size decreases. This diagram shows that cables with larger diameter copper wires are typically used to in the distribution system. As the distribution system nears its destination, the size of the wire often decreases.


Crosstalk (NEXT & FEXT)

This figure shows two types of crosstalk; near end crosstalk (NEXT) and far end crosstalk (FEXT). NEXT results when some of the energy that is transmitted in the desired direction seeps into one (or more) adjacent communication lines from the originating source. FEXT occurs when some of the digital signal energy leaks from one twisted pair and is coupled back to a communications line that is transferring a signal in the opposite direction. Generally, NEXT is more serious than FEXT as the signal interference levels from NEXT are higher.


Evolution of DSL

This figure shows the evolution of DSL systems. This diagram shows that high-speed digital subscriber line technology has been readily available since the 1970s. In the late 1990's, the addition of advanced signal processing technology allowed DSL technology to rapidly increase transmission speed to over 50 Mbps in short distances.


Table of Contents

Transmission Systems

Basic Concepts

Technologies

- Analog
- Digital

Transmission Mediums

- Copper Wire
- Coaxial Cable (Coax)
- Free Space/Air
- Fiber Optic Cable
- Surface Acoustic Wave (SAW)

Transmission Medium Limitations

- Frequency Response
- Crosstalk (Signal Leakage)
- Signal Ingress
- Bridge Tap Reflections
- Loading Coils
- Line Splice Attenuation
- Line Resistance Attenuation
- Group Delay (Dispersion)

Carrier Systems

- Plain Old Telephone Service (POTS)
- Digital Signal Level (DSx)
- Integrated Services Digital Network (ISDN)
- Digital Subscriber Line (DSL)
- Optical Carrier (OCx)
- ISDN Digital Subscriber Line (IDSL)
- Integrated Digital Loop Carrier (IDLC)

Signaling

- In-Band Signaling
- Out-of-Band Signaling

Virtual Circuits

Repeaters

Future Enhancements





About the Author

Mr. Harte has over 29 years of experience in the electronics industry including company leadership, product management, development, marketing, design, and testing of telecommunications (cellular), radar, and microwave systems. He has been issued patents relating to cellular technology. He has authored over 75 articles on related subjects and has been a speaker and panel moderator at industry trade events. Mr. Harte earned executive MBA at Wake Forest University and received his Bachelors degree from University of the State of New York. During the TDMA digital cellular standard development process, Mr. Harte served as an editor and voting company representative for the Telecommunications Industries Association (TIA) TR45.3, digital cellular standards committee. As of 2003, Mr. Harte had authored and co-authored over 20 books relating to telecommunications technology. He has served as a consultant and expert witness for leading companies including Ericsson, Siemens, VLSI, AMD, Casio, Samsung, Sony, ATT, Nokia, Hughes and many others.

Description

This book explains many types of Transmission Systems including: plain old telephone service (POTS), digital signal level (DSx), integrated services digital network (ISDN), digital subscriber line (DSL), optical carrier (OCx), ISDN digital subscriber line (IDSL), integrated digital loop carrier (IDLC), in-band signaling, out-of-band signaling, virtual circuits, and repeaters. Transmission systems interconnect communication devices by guiding signal energy in a particular direction or directions through a transmission medium such as copper, air, or glass. Described are the key types of transmission systems used in modern telecommunications networks. This includes multiplexed signals on twisted wire pairs, coax cable, fiberoptic cable and radio. Several technical aspects of transmission systems are covered including: analog transmission, digital transmission, and transmission medium limitations.

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