PULSING

In telephony , the transmission of address information to a switching office by means of pulses, i.e., signals, that originate from the subscriber , i.e., user , equipment. Note: Examples of pulsing methods are dual-tone multifrequency (DTMF) signaling , in which a unique pair of audio frequencies represents each of the respective numerals or other characters on a keypad, and rotary dialing , in which dc pulses are generated by a rotary dial . Synonyms key pulsing (when using a keypad), dial pulsing (when using a rotary dial).