A communication apparatus includes a storage unit that stores an Internet protocol (IP) address, a call connection unit that connects a call by transmitting a call connection request via a communication control apparatus to a communication apparatus, and by receiving, via the communication control apparatus, session description protocol (SDP) information in response to the call connection request, an IP address retrieval unit that retrieves an IP address included in the received SDP information, an instructing unit that overwrites the IP address stored on the storage unit with the retrieved IP address, and instructs the communication control apparatus to overwrite an IP address stored on the communication control apparatus with the retrieved IP address, and a transmitting unit that transmits facsimile data to the retrieved IP address as a destination address if the facsimile data are to be transmitted to the communication apparatus connected to the public IP network.