FIELD: data transfer systems.
SUBSTANCE: bridge designed for connecting public data network with intercom network has control unit for data transferred between distant device in public data network and internal device of intercom network, as well as memory unit that saves open-key identifier list and relevant addresses of intercom network for internal devices. Control unit functions to locate destination point for arriving data conveyed to bridge address in public data network by determining intercom network address for internal device basing on open key information included in arriving data and open-key identifier list, and relevant intercom network addresses.
EFFECT: reduced number of internet-protocol addresses and enhanced safety of connection.
21 cl, 11 dwg
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