The telephony and telegraphy sections of the collection have in recent times been further expanded; telex, fax and videotex (text on screen) exhibits were added to the telegraphy section and mobile telephony to the telephony collection. The holdings cover the main phase of development in each technology up to its final stage or the present. Morse telegraphs are among the oldest objects in this part of the collection, which also includes more than 1,500 telephones from all eras and various technologies up to today's smartphones with touchscreens. The objects mainly derived from the PTT companies and their successors, Telecom PTT and Swisscom. Objects from the company Ascom Holding AG were added in 2007. The museum specifically collects objects and documents on the use and reception history of the different types of technology.
