Communications jack with compensation for differential to differential and differential to common mode crosstalk

A communications jack assembly (200) includes: a jack frame (212) having a plug aperture (214); a dielectric mounting substrate attached to the jack frame; and a plurality of conductors (222a-228b) engaged with the mounting substrate, each of the conductors including a fixed end portion mounted with the mounting substrate and a free end portion extending into the plug aperture for electrical contact with a mating plug, each of the free end portions having substantially the same profile and being substantially transversely aligned in side-by-side relationship. A first pair of conductors (222) is sandwiched inside a second pair of conductors (226). The second pair of conductors includes a crossover (231), the positioning of crossover being selected to provide differential to common mode crosstalk compensation.