When a receiving end is a cellular phone, the cellular phone that displays
the local time at the receiving end and a base station used in this
cellular phone are realized. A time recognition unit that obtains the
local time at the receiving end using the time information acquired from
the cellular phone of the receiving end or the base station at which the
cellular phone of the receiving end is registered in stand-by mode and a
display unit that displays the local time are installed in the cellular
phone. Further, when the time information or position information of the
cellular phone registered in the base station in stand-by mode is
requested from the calling end, a unit for sending the time information
or position information at the location at which this base station exists
to the cellular phone of a requesting source is installed in the base
station.