Power line communication apparatus

A communication apparatus which performs communication through a power line and a transmission medium different from the power line, the communication apparatus comprising:

• a power board which is provided with a power supply connected to the power line through an electrical plug that is attached to the power board;
• an interface board which is separately formed from the power board and is provided with an interface for performing communication through the transmission medium;
• a communication board which is separately formed from the power board and the interface board, and is provided with a power line communicator for performing communication through the power line;
• a first connector which connects electrically the communication board to the power board and includes a transmission path for a power line communication signal;
• a second connector which connects electrically the communication board to the interface board, includes a transmission path for a communication signal transmitted and received through the interface board, and is provided at a location away from the first connector;
• and
• a heat radiator that radiates heat generated from the communication board,
• wherein the communication board is substantially perpendicular to both the power board and the interface board, and
• wherein the heat radiator holds the communication board and is disposed at a location facing the power board so as not to overlap the power plug.