FIELD: information technologies.
SUBSTANCE: telephony system comprises the following: facilities (10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32) for establishment or requesting of telephone connection between calling user and called user, including facilities (14) for reception of command signal, outgoing from calling user in phase of connection establishment, when ordinary telephone call is made, besides command signal includes signal of data or tone signal transmitted from telephone set of calling user and differing from standard command of connection establishment or break of connection, and facilities (14, 22, 28) for initiation of service rendering to calling user or called user or initiation of transaction between calling user and called user in reply to reception of specified command signal.
EFFECT: expansion of functional resources, due to initiation of service rendering without modification of user phone.
19 cl, 2 dwg
