Telephone - Overseas Transmission

telephone

Table of Contents

Introduction & Top Questions
The telephone instrument
- Working components of the telephone
  - Power source
  - Switch hook
  - Dialer
  - Ringer
  - Transmitter
  - Receiver
  - Anti-sidetone circuit
- Development of the telephone instrument
  - Early sound transmitters
  - Gray and Bell: the transmission of speech
    - The first devices
    - The search for a successful transmitter
  - Development of the modern instrument
- Cordless telephones
- Personal communication systems
The telephone network
- Switching
  - Switching systems
    - Manual switching
    - Electromechanical switching
    - Electronic switching
    - Digital switching
  - The switching network
- Signaling
  - Call-number dialing
    - Rotary dialing
    - Push-button dialing
  - Interoffice signaling
    - In-band signaling
    - Out-of-band signaling
- Transmission
  - Development of long-distance transmission
    - From single-wire to two-wire circuits
    - Problems of interference and attenuation
    - From analog to digital transmission
    - Coaxial cable
    - Microwave link
    - Optical-fibre cable
  - Overseas transmission
    - Terrestrial radio
    - Undersea cable
    - Satellite

References & Edit History Quick Facts & Related Topics

Images, Videos & Interactives

Alexander Graham Bell and the New York City–Chicago telephone link

Alexander Graham Bell demonstrating the telephone

telephone: Alexander Graham Bell's sketch of a telephone

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The extension of telephone service to other countries and continents was a goal set in the earliest days of telephone systems. In North America, service to Canada and Mexico was a natural extension of the long-distance methods used within the United States, but transmission across the ocean to Europe called for a significant amount of ingenuity. While transatlantic telegraph cables had been in service since 1866, these same cables could not be used for voice transmission, because of bandwidth limitations. Instead, the first transatlantic telephone service made use of radio. Regular service via radio between the United States and Europe ...(100 of 8665 words)

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