In the middle of the 1980s the former telecommunication office at of Rottweil installed two directional antennas on Lember Tower for the realization of a passive repeater microwave link between the communications building in Rottweil and the trunk exchange, situated at station road in Gosheim. This microwave link, which would not have been possible on direct way, served as addition to the existing telephone interwirings. After these were replaced by optical waveguide cables, this microwave link became ever more dispensable and in the year 2005 these antennas were dismantled.