In 1988, Telecom PTT introduced Switzerland’s first digital telecommunications network (ISDN). The mobile phone network was digitised in 1992 under the name NATEL D. Telecom PTT’s "Blue Window" Internet portal, launched in 1996, soon became the market leader. On 1 October 1997, Telecom PTT became Swisscom.
Telstar – the first telecommunications satellite – was launched into space in 1962. At Expo 1964 in Lausanne, the first exchange to permit international direct dialling was unveiled. In 1974, the Leuk satellite earth station went into operation in the canton of Wallis.
The launch of the first telegraph service between St. Gallen and Zurich in 1852 marked the birth of telecommunications in Switzerland. The invention of the telephone by Alexander Graham Bell in 1876 gave new impetus to the field. By 1896, the telephone had been introduced in all Swiss cantons.