A display method at calling party telephone according to detection of a status of called party telephone and an apparatus of the same

摘要

The present invention receives a calling ring signal by calling a calling party, and calls a state in which the called party is not receiving an on-hook human body. The caller's phone can call a called ring signal to notify the caller, a busy signal to inform the caller of the caller's busy condition, or an off hook signal to notify the caller that the caller has received the call. A method and apparatus for detecting and displaying the same.