Circuits, Switches and everyday Communications

before we talk about circuits…

or switches

we communicate

Bakugan Brawl!

Put them together

What are some of the ways we communicate?

Making paper.

What are they doing in this picture?

Paper was invented in 105 AD.

Making paper 101

Moveable type, Printing Press, 1450 Moveable type

Other uses… /

Take that!!!

Communicate over long distances

How many pieces were sent during 2008?

A. 1 Go-Zillion

B. 254 million

A. 201 Billion

D. 5

Electricity too….

Circuits & Switches

William Gilbert

1600 AD - first person to

apply the term, “electric”.

Otto Von Guericke

Invented the “elektrisiermaschine” or the

first power generator

Benjamin Franklin

Famous for _______________?flying a kite on a stormy day

What he learned from the

experiment was that “electricity”

can be fluid or “flow” from one

point to another.

A Belectricity

wow…wow…wow…

Journaling Experiments

Experimentation or Tinkering

Journal your results

Samuel Morse

Telegraph

Morse Code

Telegraph Operator

That will be a $1.09 please

http://www.youtube.com/watch?v=l882xbFywho

Alexander Graham Bell

sound wavesA B

over a wire

In what year was the first telephone call ever made?

A. 1

B. 2009

A. 1872

D. 1701

Large pepperoni pizza, hold the

anchovies please.

Too many lines

Switch operators

the old solution

You probably drive by them everyday

Tandem Switch

Public Switched Telephone Network (PSTN)

Leominster

Westford

KEY Signaling Voice Path

Tandem Switch

yada, yada, yada

Central Office Switch

Central Office Switch

Signaling Switch

Communications built on fundamentals

A Circuit Network

Signaling System 7 (SS7)

Central Office Switch

Central Office Switch

Public Switched Telephone Network (PSTN)

A Bsound over electricity

All of what we’ve spoken about also allows you to access the

World Wide Web…

…but that’s for another time.

Thank You