A method for transmitting keyboard, video, mouse, KVM, data, comprising: converting, by a service board, the KVM data into a KVM packet; sending, by the service board, the KVM packet to a switch board through a BASE interface according to the Advanced Telecom Computing Architecture, ATCA, specification; and forwarding, by the switch board, the KVM packet to a remote console, wherein the service board comprises: a data conversion module for converting the KVM data into the KVM packet, at least one original BASE network port, and a switch chip (10022; 10024) comprising one or two BASE network ports (100241; 100221, 100222) connected to a backplane, the switch chip (10022; 10024) further coupled to the at least one original BASE network port and coupled to the data conversion module for receiving the KVM packet; and wherein sending, by the service board, the KVM packet to the switch board through the BASE interface comprises: if the switch chip comprises two BASE network ports (100221, 100222), sending, by the switch chip, the KVM packet to the switch board through either of the two BASE network ports (100221, 100222) of the switch chip, or if the switch chip comprises one BASE network port, sending, by the switch chip, the KVM packet to the switch board through the one BASE network port of the switch chip. converting, by a service board, the KVM data into a KVM packet; sending, by the service board, the KVM packet to a switch board through a BASE interface according to the Advanced Telecom Computing Architecture, ATCA, specification; and forwarding, by the switch board, the KVM packet to a remote console, wherein the service board comprises: a data conversion module for converting the KVM data into the KVM packet, at least one original BASE network port, and a switch chip (10022; 10024) comprising one or two BASE network ports (100241; 100221, 100222) connected to a backplane, the switch chip (10022; 10024) further coupled to the at least one original BASE network port and coupled to the data conversion module for receiving the KVM packet; and a data conversion module for converting the KVM data into the KVM packet, at least one original BASE network port, and a switch chip (10022; 10024) comprising one or two BASE network ports (100241; 100221, 100222) connected to a backplane, the switch chip (10022; 10024) further coupled to the at least one original BASE network port and coupled to the data conversion module for receiving the KVM packet; and wherein sending, by the service board, the KVM packet to the switch board through the BASE interface comprises: if the switch chip comprises two BASE network ports (100221, 100222), sending, by the switch chip, the KVM packet to the switch board through either of the two BASE network ports (100221, 100222) of the switch chip, or if the switch chip comprises one BASE network port, sending, by the switch chip, the KVM packet to the switch board through the one BASE network port of the switch chip. if the switch chip comprises two BASE network ports (100221, 100222), sending, by the switch chip, the KVM packet to the switch board through either of the two BASE network ports (100221, 100222) of the switch chip, or if the switch chip comprises one BASE network port, sending, by the switch chip, the KVM packet to the switch board through the one BASE network port of the switch chip.