Abstract: A connecting and switching module employs a common type of connector for use with a plurality of types of interconnected systems by providing an adapter having a plug mateable with a common type of connector at one end, and a connector adapted to the system at the other end. In one embodiment of the invention, mechanical interference between adjacent connectors is avoided by providing alternating long and short adapters. Wiring on the circuit board of the module may be the same, with adaptation for different systems taking place in the adapter. This permits a single board design for all systems, with possible minor modification of a monitoring electronic circuit.