Telefonzentralen Echallens, Fribourg, Grandson, Liestal, Marly Building data System Igéco Construction period 1968–1971 Involved parties Architects P. Nicod, Rolf Georg Otto, J. Surchat Engineers J. Bongard, B. Clément, K. Itin, H.-R. Kipfer Building owner Direktion der eidgenössischen Bauten Executing companies Igéco SA (Betonelemente)
