Electronic exchange system wherein it is easy to alter the functions assigned to the keys of a terminal, and method of controlling an electronic exchange system

Abstract From the Canadian patent

An electronic exchange system comprising a telephone exchange for connecting at least extension lines and office lines, and at least an extension terminal which can be connected to the exchange which has keys and, can function as a communication device is disclosed. The terminal has a first memory device for storing key-assign data consisting of the codes of the keys a data-receiving, device for receiving the key-assign data a memory, control device for writing into the first memory device the key-assign data received from the telephone exchange, and a first control device for retrieving a key code from the first memory device and supplying the key code to the telephone exchange when the …