1. A voice controlled automatic dialer comprising: sound input means; a speech analyzer connected to said sound input means for generating a signal representative of characteristic patterns of an input utterance entered through said sound input means; a first memory for storing a plurality of reference signals representative of predetermined characteristic patterns of utterances of dialing numbers and command words, said predetermined characteristic patterns being representative of utterances common to any users; a second memory for storing a plurality of reference signals representative of specific characteristic patterns of utterances of dialing names defined by authorized users and entered through said sound input means to said speech analyzer after a training process; decision means for comparing the output signal of said speech analyzer with the reference signals stored in said first and second memories and generating a decision output representative of least distances between the characteristic patterns of the input utterance and the characteristic patterns represented by said reference signals; manually operated switch means for coupling the output of said speech analyzer to said second memory when the reference signal representing said dialing names is stored thereinto and coupling the output of said speech analyzer to said decision means during a full-digit dialing mode or abbreviated dialing mode; and means responsive to said decision output for generating a dialing signal for transmission to a switched network.