Stadtbahn-Tunnel / Streetcar tunnel
Cell 21/41/51: Bopser – Abzweig Altenbergstaffel / Abzweig Altenbergstaffel – Waldau – Ruhbank
Cell 22/42/52: Weinsteige – Degerloch
Cell 23/43/53: Silberwald – Sillenbuch – Schemppstraße
Base station located at Degerloch station.