Patent ID: 8879694

Claim:
A communication apparatus comprising: a first communicating portion configured to allow the communication apparatus to communicate with an external communication apparatus via a telephone line; a second communicating portion configured to allow the communication apparatus to communicate with at least one sub-communication apparatus; a third communicating portion configured to allow the communication apparatus to communicate with a data processing apparatus which is configured to process data; a data receiving section configured to receive the data transmitted from the data processing apparatus via the third communicating portion; a notifying section configured to transmit a notification to the at least one sub-communication apparatus via the second communicating portion in response to receipt of the data transmitted from the data processing apparatus; a transmitting request receiving section configured to receive a transmitting request from the at least one sub-communication apparatus to which the notification had been transmitted; a connection control section configured to establish a communication between the communication apparatus and the external communication apparatus in response to a connecting command transmitted from the at least one sub-communication apparatus; a transmitting section configured to transmit the data received by the data receiving section to the external communication apparatus in response to receipt of the transmitting request from the at least one sub-communication apparatus to which the notification had been transmitted; a first receiving section configured to receive an identification number from the data processing apparatus via the third communicating portion, the identification number being for identifying the external communication apparatus to which the data is to be transmitted; a dialing-number obtaining section configured to obtain a dialing number transmitted from the at least one sub-communication apparatus, wherein a dialed-external communication apparatus is the external communication apparatus with which the at least one sub-communication apparatus is under communication via the telephone line; and a first judging section configured to judge whether the dialing number obtained by the dialing-number obtaining section and the identification number received by the first receiving section coincide with each other or not, wherein the notifying section is configured to transmit the notification, to the at least one sub-communication apparatus, of the identification number received by the first receiving section, and wherein the transmitting section is configured to transmit the data received by the data receiving section to the external communication apparatus as the dialed-external communication apparatus when the first judging section has judged that the dialing number and the identification number coincide with each other.