US Patent 7247058 Vertical docking connector

An electrical connector includes a main housing having a forward mating face and a rearward mounting face, and a plurality of contact modules received in the main housing. Each contact module includes an upper contact module and a lower contact module joined to the upper contact module along side edges of the upper and lower contact modules. Each upper and lower contact module includes a contact housing holding rows of contacts including pairs of signal contacts and individual ground contacts.