1917
Zurich-Hottingen: first semi-automatic switchboard goes into operation.
1921
Directory inquiries goes into operation (number 11).
1931
Introduction of the recorded message (in this case the radio programme) available via telephone.
1935
Introduction of the speaking clock (number16).
1936
First coin-operated public telephone goes into operation.
1948
Switzerland boasts 500,000 telephone subscribers.
1952
Introduction of the first transalpine directional transmitter (Berne - Lugano, via Jungfraujoch) brings the Swiss network up to date.
1953
Pilot project at the Studio Bellerive in Zurich marks the dawn of the television era. Switzerland opts for the 625-line standard.
1956
People on both sides of the Atlantic are now able to ring each other up, thanks to the first transatlantic telephone cable.
Launch of the second VHF radio channel.
1958
Black-and-white television is here to stay.
1959
Switzerland boasts one million telephone subscribers.
Transformation of the last manually operated switchboard in Schuls makes the Swiss network the world's first fully automated telephone network.