A compound device has the structural hardware of a digital television, is connected
to an antenna and a telephone station, and by reading out and running either a
digital television (DTV) program or a base station program with a general processor,
it has both the function of a digital television and the function of a portable
telephone base station. The owner of the compound device receives discounts in
their subscribed telephone fee or their power fee based on records in a communication
record portion. Thus, a compound device in which a digital television is given
the function of a portable telephone base station is provided, so that a novel
infrastructure can be achieved in which insufficiencies in base stations are made
up for without requiring equipment investment expenditures and portable device
owners are given financial benefits in compensation for allowing the public use
of their private possession as a portable telephone base station.
