A multi-purpose, functional electrical stimulation (FES) system 10 includes an implantable stimulator unit 12 for stimulating a plurality of different sites in a patient's body 14. A transmitter 20 is arranged externally of the patient's body 14 for supplying signals transcutaneously to the stimulator unit 12. A controller 16 is in communication with the transmitter 20. At least one implantable switching node 26 has an input terminal 30 in electrical communication with the stimulator unit 12 and a plurality of output terminals to each of which one of a further switching node 26 and a stimulating element 24 is connected. The switching node 26 including addressing circuitry 44 for switching at least one output terminal into electrical connection with the input terminal 30 of the switching node 26 in response to a control signal received from the controller 16 via the stimulator unit 12.