The invention relates to a connector block (11) for separating insulated conductors of a first data cable (82) and a second data cable (86), said connector block containing: first and second groups (12A, 14A) of a plurality of slits (16) arranged in a row along a common side of the connector block; and a plurality of insulation displacement contacts comprising forked contact sections (21, 23) which at least partially extend into respective individual slits in order to electrically separate the insulated conductors. The groups of slits are separated by an insulation space (22) in order to reduce alien crosstalk between the conductors of the first data cable (82), which are coupled to the insulation displacement contacts of the first group of slits (12A), and the conductors of the second data cable (86), which are coupled to the insulation displacement contacts of the second group of slits (14A).