Because this is a book for engineers the practical coverage is reinforced by use of the latest interanational standards, in particular BICSI standards (USA and international) and EU requirements. This will make the book ideal for the large number of industry-based training courses. Coverage has also been matched to the requirements of the revised City & Guilds 3466-04 course.
*Covers the real-world issues of selection, design, installation, testing, safety, legislation... neglected by university texts *An easy-to-read introduction that assumes no prior knowledge beyond basic concepts of voltage and current - ideal for non-specialists as well as practitioners *Covers new BICSI (US / international) regulations and EU framework
Table of Contents
Table of Contents
Chapter 1: Talking across the Atlantic
Electricity is too slow – let’s try something mechanical
It worked, but the neighbors were not happy
Yes, very nice, but it could be faster
Would instantaneous transmission be fast enough?
Then came Morse and Cooke
A good idea was one thing, but selling it was another
Water and electricity don’t mix
The problems and the costs
Chapter 2: Technical bits that may be useful
A small charge
The current flows (direct current or DC)
Conventional current and electron flow
Alternating current (AC)
Multiples and sub-multiples
Capacitance and capacitors
Magnetism is much the same
Important effects of magnetism
Effects of temperature
Chapter 2 quiz
Chapter 3: How cables work
Using cables to transfer power
A quick look at a cable under direct current (DC) conditions
What about signals?
What happens if the load is not matched to the cable?
We don’t get perfect open circuits or short circuits
A popular misconception about current flow
Some magnetic effects
Electromagnetic interference (EMI)
EMI? Relax – you probably won’t notice it
Chapter 3 quiz
Chapter 4: Decibels – they get everywhere but what are they?
The two ways of doing decibels
Getting by with decibels
Bigger or smaller?
What if we have a truck load of amplifiers and lengths of cable?
What do the numbers mean?
Some useful numbers
The decibel is a logarithmic unit
Having found a log, how do we work back to find the number?
We can use logs to multiply and divide numbers
Summary of logs
Back to decibels
Decibels and attenuators
Mind your language
How we use decibels in a real circuit
Some more maths – but it’s not too bad
What if we know the gain and the output power but don’t know the input power?
Using decibels as a power level
Chapter 4 quiz
Chapter 5: How is data transmitted?
The simplest and most popular system
Bits and bauds
Preparing for digital transmission
Pulse code modulation (PCM)
Time division multiplexing (TDM)
NRZ (non return to zero)
AMI (alternate mark inversion)
Chapter 5 quiz
Chapter 6: We don’t do it like that
What are codes and standards?
Are they a good thing?
Where do they come from?
National organizations and standards
Chapter 7: Not all cables are the same
American Wire Gauge
Electromagnetic interference (EMI) and the common cable cures
Types of cable
Twisted cable – over 100 years old and still doing fine
A few general bits
Categories and classes
Category 1 and Class A using UTP cables
Category 2 and Class B using UTP cables
Category 3 and Class C using UTP cables
Category 4 using UTP cable
Categories 5, 5e and Class D using UTP, FTP and S-FTP cables
Category 6 and Class E using UTP or ScTP cables
Category 7 and Class F using STP (SSTP) cables
Who mentioned Cat 8?
Chapter 7 quiz
Chapter 8: Selecting, protecting and connecting cables
Selecting a cable
How fast does the signal move through a cable?
Protecting cables by design
Chapter 8 quiz
Chapter 9: Networks
LANs are a good idea
Copper cables for LANs
Mesh topology – simple but seldom used
Hierarchical star topology
Physical and logical networks
Controlling the flow of data
Carrier sense multiple access/collision detection (CSMA/CD) as used on the Ethernet system
Network connecting devices
Chapter 9 quiz
Chapter 10: Cables in buildings and between buildings
Things to consider at the design stage
Maintenance and modification of the system
Electromagnetic interference (EMI)
Where are the pathways likely to be found?
In the ceiling
Under the floor
Or even in the floor
It may be in conduit
The work area (WA)
Undercarpet telecom cable (UTC) installation
There are some disadvantages
Consolidation points (CPs)
To the telecommunication room
Cable used – types and lengths
Give them some slack
Cable for the backbone
Backbone cabling in multistory buildings
Slots, cores and sleeves
Installing heavy cables
Connecting two buildings
Locating previously buried cables
Dig a hole method
A final thought
Chapter 10 quiz
Chapter 11: Does it work?
Wire map testers
Tone generator and detector
Time domain reflectometer (TDR)
The basic link
The permanent link
Testing the cables
Direct current (DC) loop resistance
Length of a cable
Propagation delay and delay skew
Chapter 11 quiz
Chapter 12: Staying alive until payday
Unpleasant things that can happen to us
First aid for electrocution
Installation issues that affect us
The lightning strike
Grounding of power systems
Telecommunications grounding and bonding
Batteries can be dangerous
Materials that we may meet
Heavy cable installation
The rolling hitch
Raising the cable
Chapter 12 quiz
Chapter 13: A brief introduction to fiber optics
Why do we use optic fibers?
What is it?
How clear is clear?
What is the difference between optic fibers and fiber optics?
How thick are they?
Are optic fibers dangerous?
What are optic fibers used for?
What makes the light stay in the fiber?
What else do we need?
Is the size of the core important?
What light source and light detectors do we use?
Are lasers dangerous?
Are all lasers dangerous?
How do we recognize a fiber optic cable?
Will it break if I bend it?
How can I find out more about fiber optics?
Chapter 13 quiz
Chapter 14: Moving on
BICSI – a fine organization
So, what is BICSI?
What doesn’t BICSI do?
So, what does it do?
Why is it good for its members?
Why is it good for customers?