The forced labour camp at Kirchbichl (Tyrol, Austria) was run during the National Socialist regime largely for the construction of a hydropower plant on the river Inn as part of a planned enlargement of the hydropower industry in the Alps. Archaeological excavations at this site brought up a broad spectrum of materiality from different spheres of activity. In this case, the focus lies on a type of objects which has been only rarely discussed so far. Material relics of telecommunication raise questions concerning the connection of the camp administration to a communication network, which made an immediate response possible, as regards the progress of the hydropower plant construction site, but also in terms of the recruiting and management of forced labourers. The aim of this paper is the contextualisation of archaeological evidence in applying historical archaeological methods by addressing other available sources, such as written reports, plan drawings or photographs. The scientific value of a wide-ranging approach will be stressed, while focussing on the examination and identification of objects, their use, producers and technological background.