A circuit board for use in a modular electrical connector, the circuit board comprising: a first surface and an oppositely facing second surface; signal pathways provided on the first surface, the signal pathways having signal pathway ends abutting a mounting end of the circuit board; first ground pathways provided on the first surface, each of the first ground pathways positioned adjacent at least one of the signal pathways, the first ground pathways having first ground pathway ends abutting the mounting end of the circuit board; one or more second ground pathways provided on the second surface, the one or more second ground pathways having second ground pathway ends abutting the mounting end of the circuit board; wherein the positioning of the signal pathway ends abutting the mounting end, the positioning of the first ground pathway ends abutting the mounting end and the positioning of the second ground pathway ends abutting the mounting end reduces cross-talk between signal pairs, wherein the signal pathways have mating signal contact pads, signal traces and mounting signal contacts, the signal traces extend from proximate a mating end of the circuit board to abutting the mounting end of the circuit board, wherein the first ground pathways have first mating ground contact pads, first ground traces and first mounting ground contacts, the first ground traces extend from proximate the mating end to abutting the mounting end of the circuit board, and wherein the second ground pathways have second ground traces, the second ground traces extend to abut the mounting end of the circuit board, characterised in that the second ground traces extend from proximate and along an edge of the mating end of the circuit board. a first surface and an oppositely facing second surface; signal pathways provided on the first surface, the signal pathways having signal pathway ends abutting a mounting end of the circuit board; first ground pathways provided on the first surface, each of the first ground pathways positioned adjacent at least one of the signal pathways, the first ground pathways having first ground pathway ends abutting the mounting end of the circuit board; one or more second ground pathways provided on the second surface, the one or more second ground pathways having second ground pathway ends abutting the mounting end of the circuit board; wherein the positioning of the signal pathway ends abutting the mounting end, the positioning of the first ground pathway ends abutting the mounting end and the positioning of the second ground pathway ends abutting the mounting end reduces cross-talk between signal pairs, wherein the signal pathways have mating signal contact pads, signal traces and mounting signal contacts, the signal traces extend from proximate a mating end of the circuit board to abutting the mounting end of the circuit board, wherein the first ground pathways have first mating ground contact pads, first ground traces and first mounting ground contacts, the first ground traces extend from proximate the mating end to abutting the mounting end of the circuit board, and wherein the second ground pathways have second ground traces, the second ground traces extend to abut the mounting end of the circuit board, characterised in that the second ground traces extend from proximate and along an edge of the mating end of the circuit board.