Patent ID: 6718185
Filing Date: 2004-04-06
Classification: H04M

Abstract:
A radio telephone system having additional functions, comprising:(a) an exchange device for connecting/disconnecting telephone lines; (b) a storage device for storing a subscriber database; the subscriber database containing subscriber data of the system and status data about status of the additional functions; (c) a radio telephone connectable to the exchange device by radio; and (d) the telephone having a screen for displaying specific icons corresponding to the status data; wherein when a piece of the status data in the subscriber data has been changed, an icon signal corresponding to the piece of status data thus changed is sent to the telephone; wherein the telephone receives the icon signal thus sent and displays a specific icon corresponding to the icon signal on the screen, and wherein the icon signal is sent to the radio telephone along with a disconnection signal or a channel release signal sent from the exchange device.