FIELD: radio engineering, communication.
SUBSTANCE: invention relates to the field of indication of number of calling subscriber in the device of the called subscriber. The first data (ANI) coded in a digital format are received, which are added by digits of a calling subscriber number (A), they are used for generation of two-frequency signal for each digit and the generated signals are transmitted into the telephone set (CPEB) of the called subscriber (B). All operations are performed automatically in a gateway (GW) which transfers data between networks using data transmission protocols which differ from each other, and the gateway (GW) is controlled by a control unit (GWC). Besides, for data transmission between the gateway (GW) and the control unit (GWC) use the IETF RFC 3015 or ITU-T H.248.1 protocol or the protocol based on one of these protocols. The essence of the invention is that each digit is represented as a signal consisting of two frequencies selected from the frequencies 700 Hz, 900 Hz, 1100 Hz, 1300 Hz, 1500 Hz and 1700 Hz between signals there are no pauses, and for the indication of the repeating symbol in the first data (ANI) a repetition symbol is used.
EFFECT: possibility of rendering of services of identification of number of the calling subscriber to the subscribers who use VoIP protocol, but still connected to analogue lines or to analogue access devices.
15 cl, 1 tbl, 10 dwg
