A device for detecting network traffic content is provided. Said preform is made up of warp yarns and of weft yarns, the direction of the warp yarns forming the longitudinal direction of the preform. Voice data is communicated between the system and one of a plurality of telephone devices coupled to the system. As a result, the total volume of liquor exiting the digester through the screens is divided into equal volumes flowing from the wash zone of the digester through each of the wash screens. A decision whether or not to cache input provenance data is made based on a likelihood of the input provenance data being used to produce aggregated provenance data.