Abstract: A telephone for setting up a conference call, the telephone comprising a memory for storing data relating to a first and second user; control means for retrieving said data from the memory and originating a call to the first user the control means being responsive to a signal indicating that the first call has been established originates a call to the second user.

Abstract: The present invention relates to a method for producing a ringing tone of a telephone and a telephone, which comprises a sound generator for generating the ringing tone as a response to an incoming call, a memory for storing a signal representing the ringing tone, means for retrieving the signal from the memory and for inputting the signal into the sound generator for generating the ringing tone, and sound reproduction means for reproducing the ringing tone generated by the sound generator. In the method, information defining the ringing tone is input as characters, each character defining both pitch and duration of a tone and stored in the memory of the telephone, for which the telephone comprises means for inputting information defining the ringing tone as characters, each character defining both pitch and duration of a tone. Thus, a desired melody is produced as the ringing tone. Notes can be produced on a stave displayed on a display of the telephone.

Abstract: The program code of an object program of a radiotelephone is recorded into a RAM (3) rather than in an EPROM as is conventional. The checking of the program code and the loading of the program from an external device coupled thereto via an external bus is controlled by program recorded in a ROM (4). This allows the program code to be changed and updated as required with time consuming and expensive replacement of a whole memory.