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Telecommunications
 Systems Overview
Introduction to Telephony




                  Fig 1: Morse Code

USA AUS
1844 1854
Introduction to Telephony




                  Fig 2: Telegraph system

USA AUS O/S
1844 1854 1870s
Introduction to Telephony




                      Fig 3: Telex system

USA AUS O/S
              Telex
1844 1854 1870s
Introduction to Telephony




                            Fig 4: The First Telephone
                    Phone
USA AUS O/S         Demo
              Telex
1844 1854 1870s      1876
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