Patent ID: 6868150

Claim:
A method for sending to a called station of a first party who subscribes to a Custom Local Area Signaling System (CLASS) service including Caller Identification (Caller ID) and who is engaged in a telephone conversation with a second party a directory telephone number (DN) of a third party calling a telephone number of the first party, comprising the steps of: (a) receiving at a terminating central office of the first party who subscribes to said CLASS service including said Caller ID and who is engaged in the telephone conversation with the second party the third party DN flagged as public from an originating central office of the third party indicating that said DN of the third party is to be disclosed at the called station of the first part; (b) said terminating central office sending a call waiting (CW) tone signal to the first pay; and (c) said terminating central office then transmitting said DN of the third party to the called station of the first party during a silent interval after said CW tone signal.