Connector where both of the mating parts are the same. See the linked IBM's data connector for the probably most common historical example (incidentally it is n

Connector where both of the mating parts are the same. See the linked IBM's data connector for the probably most common historical example (incidentally it is not specific to Token Ring, but part of IBM's structural cabling system and thus a direct competitor to WE/AT&T's modular jacks popularly called RJ-whatever). More contemporary example is Anderson PowerPole, used for various DC power applications.