Patent ID: 7433454

Claim:
A method for displaying calling party information received from an external public network, in which a telephone terminal for communication network connection and an information terminal are connected in a second network and the second network is connected to the external public network via a gateway apparatus comprising a protocol conversion function, the method comprising: managing the telephone terminal and the information terminal by the gateway apparatus by associating the telephone terminal with the information terminal when a telephone number from the external public network is received by the gateway apparatus and transmitted from the gateway apparatus to the telephone terminal, when the calling party information transmitted from the external public network is received by the gateway apparatus, allowing the gateway apparatus to notify the information terminal associated with the telephone terminal to which the information is to be transmitted, of the received calling party information and transmitting the calling party information and information indicating the telephone terminal to which the calling party information is to be transmitted to the information terminal, and displaying the calling party information and the information indicating the telephone terminal to which the calling party information is to be transmitted on the information terminal which is notified of the calling party information.