the present invention relates to communication techniques , and discloses a method for the calling party to reinitiate a call in card number service , so that the calling party in card number service can conveniently release his current call and reinitiate a new call . in the present invention , the call controller instructs the calling gateway to detect the preset key combination in the session , if the calling gateway detects the key combination , then reports it to the call controller , and the call controller sends a message to the called party to release the call and releases the called party , and simultaneously sends an indication that the called party has hung up to scp and waits for the calling party to dial again . the present invention enables the calling party to control his dial completely by himself , so as to dramatically save the time for the calling party of card number service to initiate a new call , and make the services more user - friendly . at the same time , the technical solution of the present invention also alleviates network load to the maximum extent .