A wireless communication apparatus stores a plurality of cellular phones in an
extension, connects a plurality of cellular phones to a base station, and sets
up the communication speed of a communication channel to a base station according
to the communication speeds of a plurality of the cellular phones. The wireless
communication apparatus maintains the communication speed of a communication channel
when a total sum of the speed of the communication which one of the plurality of
cellular phones starts and the speed of the communication previously performed
is equal to or less than the communication speed of the communication channel.
An IMT2000 network stores the wireless communication apparatus and the base station
corresponding to a plurality of cellular phones in a location registration database
and processes incoming calls to a plurality of cellular phones according to the
location registration database. Further, the IMT2000 network performs a location
registration to a public network corresponding to a plurality of cellular phones
(PHS, PDC).
