The telegraph fund contains the rarest telegraph devices used in this country, along with teletype printers and other telegraph machinery.

The telephone fund contains telephones from all systems used in the country, from the earliest to today's, also manual switchboards and parts of automatic switchboards. Among the transmission technology there are amplifiers, and parts and models of telephone lines and cabling.

The radiotechnology fund contains several early devices for telegraphing with evanescent waves; from domestic production a spark transmitter built in 1918 by Prof. Šimek for communicating with Paris. The collection is a large set of early radiotelegraph and radiotelephone vacuum tube devices, primarily of foreign manufacture; a large set of foreign (French, British, German) and domestic radio receivers; a large set of broadcast and telecommunication receivers from the 1930s through almost today, both foreign and domestic manufacture (mostly post-war Tesla company); broadcast transmitters used in this country of both foreign and domestic manufacture, and associated devices.

The fund of television technology contains models and originals of mechano-optical systems for displaying images, including Okolicsany's original wave-slot mechanism, experimental television receivers with Nipkow scanning disc, and experimental television transmitter and receiver of prof. Šafránek. From foreign manufacture of the early days, the collection contains a German Fernseh brand television receiver from 1938. From the post-war period, the collection contains mostly domestic items, from the Tesla company, and even recording and transmitting technology. The fund even contains a few devices for transmitting pictures.