Integrated carrier-current adapter comprising a principal functional block (PLTC) supplied with direct current by a first internal voltage converter (AC/DC), - a switch, to cut off the direct current supply to the principal functional block (PLTC) when the adapter is operating in standby mode; and - a control block (PLTS), supplied with direct current, to control the open or closed state of the switch in order to cut off the direct current supply to the principal functional block (PLTC); and - an output cable comprising a network cable to carry high-speed digital information flows, together with a current cable to supply direct current to a device connected to the output of the adapter, characterized in that: the adapter further comprises a filter F to filter high-frequency signals, linking a mains socket (AC_IN) to an input provided for the purpose of connecting a second voltage converter (AC/DC_D) designed to supply direct current, on the one hand to the control block (PLTS) via a direct-current adapter (DC/DC_S) and on the other hand via an electric cable to the device, the direct current supply to the principal functional block (PLTC) and that to the control block (PLTS) and the device being independent of each other, the means of cutting off the direct current supply to the principal functional block (PLTC) being arranged upstream from the first internal voltage converter (AC/DC) at its input and connected to the mains socket (AC_IN), so that the direct current supply to the control block (PLTS) is not interrupted; and an input terminal (DC-IN) and a dock connection (AC_OUT), such dock connection (AC_OUT) and input terminal (DC-IN) being provided for the purpose of connecting the second voltage converter (AC/DC_D), the second voltage converter being an external voltage converter. - a switch, to cut off the direct current supply to the principal functional block (PLTC) when the adapter is operating in standby mode; and - a control block (PLTS), supplied with direct current, to control the open or closed state of the switch in order to cut off the direct current supply to the principal functional block (PLTC); and - an output cable comprising a network cable to carry high-speed digital information flows, together with a current cable to supply direct current to a device connected to the output of the adapter, the adapter further comprises a filter F to filter high-frequency signals, linking a mains socket (AC_IN) to an input provided for the purpose of connecting a second voltage converter (AC/DC_D) designed to supply direct current, on the one hand to the control block (PLTS) via a direct-current adapter (DC/DC_S) and on the other hand via an electric cable to the device, the direct current supply to the principal functional block (PLTC) and that to the control block (PLTS) and the device being independent of each other, the means of cutting off the direct current supply to the principal functional block (PLTC) being arranged upstream from the first internal voltage converter (AC/DC) at its input and connected to the mains socket (AC_IN), so that the direct current supply to the control block (PLTS) is not interrupted; and an input terminal (DC-IN) and a dock connection (AC_OUT), such dock connection (AC_OUT) and input terminal (DC-IN) being provided for the purpose of connecting the second voltage converter (AC/DC_D), the second voltage converter being an external voltage converter.