Pset_SymmetricPairCable Properties applicable to a symmetric pair cable, which is is a copper cable with a variable number of copper twisted symmetric pair conductors used to transmit data by means of electrical signals. this property set is applicable to type or occurrence of _IfcCableSegment_ with predefined type CABLESEGMENT IfcCableSegment/CABLESEGMENT IfcCableSegment/CABLESEGMENT NumberOfTwistedPairs Total number of twisted wire pairs in copper pair cables. NumberOfUntwistedPairs Total number of untwisted wire pairs in the copper pair cable.