A transmission apparatus, comprising: N Ethernet Medium Access Control MAC ports (RS101-1,..., RS101-N), wherein each Ethernet MAC port is corresponding to a physical coding layer interface, wherein the physical coding layer interfaces that correspond to any two different Ethernet MAC ports differ, K Ethernet physical layer interfaces(103-1,..., 103-K), wherein each Ethernet physical layer interface is corresponding to a physical scrambling layer interface, wherein the physical scrambling layer interfaces that correspond to any two different Ethernet physical layer interfaces differ, and a connection device, wherein both N and K are positive integers; wherein the connection device is configured to control a time-division interconnect bus in the connection device or a time-division space-division switching matrix in the connection device to implement a connection between a timeslot of the physical coding layer interface and a timeslot of the physical scrambling layer interface, wherein when the connection device is configured to control a time-division interconnect bus in the connection device, the N Ethernet MAC ports are separately connected to the time-division interconnect bus in the connection device by using the corresponding physical coding layer interfaces, and the K Ethernet physical layer interfaces are separately connected to the time-division interconnect bus in the connection device by using the corresponding physical scrambling layer interfaces; and when the connection device is configured to control a time-division space-division switching matrix in the connection device, the N Ethernet MAC ports are separately connected to the time-division space-division switching matrix in the connection device by using the corresponding physical coding layer interfaces, and the K Ethernet physical layer interfaces are separately connected to the time-division space-division switching matrix in the connection device by using the corresponding physical scrambling layer interfaces. N Ethernet Medium Access Control MAC ports (RS101-1,..., RS101-N), wherein each Ethernet MAC port is corresponding to a physical coding layer interface, wherein the physical coding layer interfaces that correspond to any two different Ethernet MAC ports differ, K Ethernet physical layer interfaces(103-1,..., 103-K), wherein each Ethernet physical layer interface is corresponding to a physical scrambling layer interface, wherein the physical scrambling layer interfaces that correspond to any two different Ethernet physical layer interfaces differ, and a connection device, wherein both N and K are positive integers; wherein the connection device is configured to control a time-division interconnect bus in the connection device or a time-division space-division switching matrix in the connection device to implement a connection between a timeslot of the physical coding layer interface and a timeslot of the physical scrambling layer interface, wherein when the connection device is configured to control a time-division interconnect bus in the connection device, the N Ethernet MAC ports are separately connected to the time-division interconnect bus in the connection device by using the corresponding physical coding layer interfaces, and the K Ethernet physical layer interfaces are separately connected to the time-division interconnect bus in the connection device by using the corresponding physical scrambling layer interfaces; and when the connection device is configured to control a time-division space-division switching matrix in the connection device, the N Ethernet MAC ports are separately connected to the time-division space-division switching matrix in the connection device by using the corresponding physical coding layer interfaces, and the K Ethernet physical layer interfaces are separately connected to the time-division space-division switching matrix in the connection device by using the corresponding physical scrambling layer interfaces.