Telephone

The Telephone

By emerbrannelly

  • 1st Telephone

    1st Telephone
    Alexander Graham Bell created the telephone
    *Aproxamate date

  • Telephone can connect across major cites

    Telephone can connect across major cites
    *Aproxamate date

  • Fleming invents the vacuum diode

    Fleming invents the vacuum diode
    *Aproxamate date

  • First transcontinental telephone call

    First transcontinental telephone call
    *Aproxamate date

  • Switching systems and rotary-dial telephones

    Switching systems and rotary-dial telephones
    *Aproxamate date

  • Frequency multiplexing concept

    Frequency multiplexing concept
    *Aproxamate date

  • North American Numbering Plan

    North American Numbering Plan
    *Aproxamate date

  • A Mathematical Theory of Communication

    A Mathematical Theory of Communication
    *Aproxamate date

  • First phone to combine a ringer and handset

    First phone to combine a ringer and handset
    *Aproxamate date

  • Direct longdistance calling first available

    Direct longdistance calling first available
    *Aproxamate date

  • First transatlantic telephone cable

    First transatlantic telephone cable
    *Aproxamate date

  • First commercial digital transmission system

    First commercial digital transmission system
    *Aproxamate date

  • Telstar 1

    Telstar 1
    *Aproxamate date

  • Touch-tone telephone is introduced

    Touch-tone telephone is introduced
    *Aproxamate date

  • First electronic central office switching system

    First electronic central office switching system
    *Aproxamate date

  • First Emergency call is made

    First Emergency call is made
    *Aproxamate date

  • First portable mobile is made

    First portable mobile is made
    *Aproxamate date

  • Common channel interoffice signaling

    Common channel interoffice signaling
    *Aproxamate date

  • Public tests of a new cellular phone system

    Public tests of a new cellular phone system
    *Aproxamate date

  • Voice Over Internet Protocols

    Voice Over Internet Protocols
    *Aproxamate date

  • 100 million cellular telephone subscribers

    100 million cellular telephone subscribers
    *Aproxamate date