FIELD: radio engineering, communication.
SUBSTANCE: telephone system has means (14) of receiving a command signal from a caller in connection establishment phase when making an ordinary telephone call, the command signal including a data signal or a tone signal transmitted from the telephone (10) of the caller; and means (14, 22, 28) of initiating provision of a service to the caller or callee or initiating a transaction between a caller and a callee in response to reception of said command signal.
EFFECT: overcoming speech and data separation by query call context switching and integration of data processing and transmission methods into the established speech connection.
30 cl, 2 dwg
