With reference to any one of the first aspect or the foregoing implementations of the first aspect, in another implementation of the first aspect, the management channel is a management channel of the physical connection group, the multiple physical connections in the physical connection group share the management channel of the physical connection group, and content of the timeslot configuration tables used by the multiple physical connections and/or the content of the configuration table of the physical connection group are/is transmitted using the management channel of the physical connection group.