Abstract: A system and a method for communicating the location of an emergency caller through a telephone network use a mobile telephone set (1) having a location detection unit (12). The position data is translated into a stream of audio tones to be transmitted while the call connection is in progress. According to an alternative solution the position data is translated into one of a multitude of assigned telephone numbers to be transmitted during the setup phase of the call connection. The telephone numbers can be combined with the ID of the cell tower (21) the cellular phone (1) is communicating with. The invention combines well established techniques resulting in a cost efficient cellular emergency call service.

Abstract: A telephone network system for communicating location or status information concerning a mobile unit by cellular telephone coupled with the mobile unit in which sensed location or status information at any selected instant of time is converted to one of a multiple of coded, assigned telephone call-numbers uniquely identifying such information at that time, where the assigned call-number is transmitted over the network, and where the assigned call-number is received at a remote location, with the location or status information being extracted before any telephone call-connection from the mobile unit to the remote location is completed. The coded, assigned telephone call-numbers are reserved by the system operator from the telephone company serving the area of the remote location, and extracting the location or status information before any telephone call-connection is completed saves the costs to an end user of the mobile unit associated with a conventional telephone call-connection.

Abstract: The present invention relates to a method for using the silent interval during which an incoming call is still on hook to send limited data to a switch for storage and eventual retrieval. The system may be used in connection with a global positioning application, such as truck monitoring, or remote water or electric meter reading system.

Abstract: A method for recognizing permitted and prohibited coins permits precise and trouble-free assignment of coins by a procedure in which, during a learning step, characteristic values of reference coins are determined without contact and the measured values of coins to be investigated are compared with the characteristic values. The measured values are determined during rolling of the coins through a chute (6). Light barriers (204a-e, 205a-e) which determine blocking times when the coins roll through are used for the measurement.