An Advanced Telecom Computing Architecture, ATCA, system, comprising: a Rear Transition Module, RTM/Front Transition Module, FTM; and a Front Board, FRB, comprising a first power conversion/control module that supplies a power to the FRB and the RTM/FTM; characterized in that, a handle switch and a Module Management Controller, MMC of the RTM/FTM and an Intelligent Platform Management Controller, IPMC of the FRB constitute a control circuit and the control circuit is adapted to output a control signal; the system further comprises: a second power conversion/control module, adapted to supply a power from the first power conversion/control module to the RTM/FTM according to the control signal; wherein the power supplied by the first power conversion/control module to the RTM/FTM is divided into a management power input to the MMC and a load power supplied to the second power conversion/control module; and the second power conversion/control module supplies the load power to the RTM/FTM according to the control signal; wherein the handle switch is adapted to output a signal that requests for activating the RTM/FTM when the RTM/FTM is plugged in a corresponding slot on the FRB and a handle of the RTM/FTM is closed; the MMC is adapted to output a signal that requests for supplying a load power to the RTM/FTM according to the signal that requests for activating the RTM/FTM; the IPMC is adapted to output to the MMC a control signal that permits supplying the load power, after receiving from the MMC the signal that requests for supplying the load power of the RTM/FTM; and the MMC is further adapted to output to the second power conversion/control module the control signal that permits supplying the load power after getting the permission. a Rear Transition Module, RTM/Front Transition Module, FTM; and a Front Board, FRB, comprising a first power conversion/control module that supplies a power to the FRB and the RTM/FTM; characterized in that, a handle switch and a Module Management Controller, MMC of the RTM/FTM and an Intelligent Platform Management Controller, IPMC of the FRB constitute a control circuit and the control circuit is adapted to output a control signal; the system further comprises: a second power conversion/control module, adapted to supply a power from the first power conversion/control module to the RTM/FTM according to the control signal; wherein the power supplied by the first power conversion/control module to the RTM/FTM is divided into a management power input to the MMC and a load power supplied to the second power conversion/control module; and the second power conversion/control module supplies the load power to the RTM/FTM according to the control signal; wherein the handle switch is adapted to output a signal that requests for activating the RTM/FTM when the RTM/FTM is plugged in a corresponding slot on the FRB and a handle of the RTM/FTM is closed; the MMC is adapted to output a signal that requests for supplying a load power to the RTM/FTM according to the signal that requests for activating the RTM/FTM; the IPMC is adapted to output to the MMC a control signal that permits supplying the load power, after receiving from the MMC the signal that requests for supplying the load power of the RTM/FTM; and the MMC is further adapted to output to the second power conversion/control module the control signal that permits supplying the load power after getting the permission. a second power conversion/control module, adapted to supply a power from the first power conversion/control module to the RTM/FTM according to the control signal; wherein the power supplied by the first power conversion/control module to the RTM/FTM is divided into a management power input to the MMC and a load power supplied to the second power conversion/control module; and the second power conversion/control module supplies the load power to the RTM/FTM according to the control signal; wherein the handle switch is adapted to output a signal that requests for activating the RTM/FTM when the RTM/FTM is plugged in a corresponding slot on the FRB and a handle of the RTM/FTM is closed; the MMC is adapted to output a signal that requests for supplying a load power to the RTM/FTM according to the signal that requests for activating the RTM/FTM; the IPMC is adapted to output to the MMC a control signal that permits supplying the load power, after receiving from the MMC the signal that requests for supplying the load power of the RTM/FTM; and the MMC is further adapted to output to the second power conversion/control module the control signal that permits supplying the load power after getting the permission.