AUDIBLE MESSAGE ALERT WITH EAR PROXIMITY DETECTOR FOR PORTABLE HANDSETS
Original Publication Date: 1991-Apr-01
Included in the Prior Art Database: 2001-Dec-04
Telecommunications systems which utilize portable handsets often must send internally generated messages, such as call-progress messages, to the handset user. Other audible call progress messages may be sent to the handset from sources outside the system. (Probably the most common one of these is the audible call progress message "Hello", sent by the called party when he answers!) These messages generally arrive during or shortly after the time that the handset user is operating the handset control keys or has just finished dialing a number. Because operation of the handset keys requires that the handset be moved away from the user's ear to a position where the handset can be viewed by the user, the user generally is unable to hear any audible messages during operation of the handset keys. For handsets which incorporate an alphanumeric display, there is usually no problem caused by the inability to hear internally generated audible messages, because a properly designed system simultaneously will send similar messages to the handset display, where they can be read by the user. Extra long or complicated internally generated messages, however, and'audible messages which come from outside the system generally cannot be duplicated adequately, if at all, on the handset display. Users with handsets which do not incorporate a display of course must receive all messages audibly.