velocity removing the energy input to the solenoids 28 and 29 the same signal from the comparator 12 triggers the timer 15 which in turn clears the register 7 thus avoiding that a code identity can formed between the output of the counter 13 until a new code is fed into the register 7 to send any number to the computer the operator will proceed sending it digit by digit following the order from the digit of more weight to the digit of less weight the signals sent by the operator making use of the dial pass through the wave shaper 1 then by the counter inhibitor 2 and they arrive to the counter 3 which converts the received signal to the binary system the corresponding bits are stored in the storage register 7 after having been stored in the register 7 these bits are driven by the code converters 8 and 9 to the digital computer or calculator 44 and to the digital multiplexer 10 respectively from the multiplexer 10 they pass to the comparator 12 to be compared with the bits which come from the counter 13 which continuously retains the information about which section of the disk 30 is situated in front of the magnetic reproduction head 22 when the comparator 12 establishes an identity between the bits coming from the multiplexer 10 and the bits coming from the counter 13 a signal is immediately produced which gives energy to the solenoids 28 and 29 making thus the disk 30 to pass from the exploration velocity to the reproduction velocity in the section which has recorded the voice corresponding to the digit simbol or operator to be reproduced and which binary code is at the output of the multiplexer 10 the reproduction is made by.