Memory dialing control system having improved telephone number retrieval function by using history information

Claim 1

A memory dialing system comprising: a first memory including a memory dialing area for registering a plurality of telephone numbers; a second memory for storing history information indicating how used telephone numbers among said plurality of telephone numbers have been used in both call transmitting and call receiving; displaying means for displaying said history information read out from said second memory so that an operator may retrieve a telephone number from among said plurality of telephone numbers by using said history information displayed thereby; and control means interconnected between said first and second memory and said displaying means for controlling writing data into and reading data out from said memory dialing area, controlling writing and storing history information into said second memory on each transmission/reception occasion and controlling a displaying of said registered telephone numbers on said displaying means so that said telephone number retrieved by the operator may be dialed by the operator, wherein: said first memory is also controlled by said control means to register therein names and identification numbers respectively relevant to said plurality of telephone numbers so that said plurality of telephone numbers may be respectively retrieved by specifying the corresponding respective names: said second memory comprises: a sort table for storing said identification numbers in a predetermined order according to the first letters in the spellings of said names; a history telephone-number table for storing said used telephone numbers in the order in which said used telephone numbers have been used; a history identification-number table for storing used identification numbers among said registered identification numbers respectively relevant to said used telephone numbers in the order in which said used telephone numbers have been used; and a frequency table for storing used identification numbers in an order according to the frequencies with which said used telephone numbers have been used.