In base‐to‐emitter diodes ofp‐n‐pgermanium transistors biased in reverse direction far below breakdown, bistable current fluctuations have been observed. These fluctuations show the typical waveform of a random telegraph signal. Its statistical properties have been analyzed. The mean‐value crossing‐time intervals of current measured by a multichannel pulse‐height analyzer turned out to be independent of reverse voltage but dependent upon temperature. Detailed experimental data are given.