Telecommunications plug for high data rate applications

A telecommunications plug includes a housing having an insertion portion sized to be received in a telecommunications jack, and a circuit board at least partially disposed within the housing. The circuit board includes a plurality of contacts exposed through the insertion portion to electrically connect to contact springs of the telecommunications jack and a plurality of wire connections receiving wires of a telecommunications cable. The plug further includes a switching mechanism movable relative to the circuit board and configured to switch between first and second positions, wherein the first and second positions selectably provide capacitive crosstalk between wire pairs within the plug.