An adapting apparatus, configured to manage adapting information between photoelectric layers in an optical transport network, OTN, the apparatus comprises: an adapter pool, wherein the adapter pool is located between an optical data unit, ODUk, layer and an optical channel, OCh, layer, and the adapter pool comprises one or more adapters which are respectively connected to an OCh layer link and an ODUk layer link; the adapting apparatus characterized in that for each of the adapters, the information that the adapter pool uses for managing comprises: information for indicating connectivity of the adapter with the OCh layer link and with the ODUk layer link, and information for indicating an adapter capability of the adapter; wherein the information for indicating the connectivity of the adapter with the OCh layer link and with the ODUk layer link comprises: information for indicating connectivity between the adapter and the OCh layer link interface, and information for indicating connectivity between the adapter and the ODUk layer link interface; wherein the information for indicating an adapter capability of the adapter comprises adapter capability descriptions of multiple adapter sets, and each set comprises: one or more adapters, one or more wavelengths and one interface adapting capability description, IACD; information for indicating connectivity between an input direction of the adapter and the OCh layer link interface comprises multiple groups of connectivity information, and each group comprises: one or more OCh layer input interfaces, and one or more adapters; information for indicating connectivity between an output direction of the adapter and the OCh layer link interface comprises multiple groups of connectivity information, and each group comprises one or more adapters, and one or more OCh link input interfaces; information for indicating connectivity between the adapter and the ODUk layer link interface comprises multiple groups of connectivity information, and each group comprises: one or more adapters, and one or more ODUk link interfaces. an adapter pool, wherein the adapter pool is located between an optical data unit, ODUk, layer and an optical channel, OCh, layer, and the adapter pool comprises one or more adapters which are respectively connected to an OCh layer link and an ODUk layer link; the adapting apparatus characterized in that for each of the adapters, the information that the adapter pool uses for managing comprises: information for indicating connectivity of the adapter with the OCh layer link and with the ODUk layer link, and information for indicating an adapter capability of the adapter; wherein the information for indicating the connectivity of the adapter with the OCh layer link and with the ODUk layer link comprises: information for indicating connectivity between the adapter and the OCh layer link interface, and information for indicating connectivity between the adapter and the ODUk layer link interface; wherein the information for indicating an adapter capability of the adapter comprises adapter capability descriptions of multiple adapter sets, and each set comprises: one or more adapters, one or more wavelengths and one interface adapting capability description, IACD; information for indicating connectivity between an input direction of the adapter and the OCh layer link interface comprises multiple groups of connectivity information, and each group comprises: one or more OCh layer input interfaces, and one or more adapters; information for indicating connectivity between an output direction of the adapter and the OCh layer link interface comprises multiple groups of connectivity information, and each group comprises one or more adapters, and one or more OCh link input interfaces; information for indicating connectivity between the adapter and the ODUk layer link interface comprises multiple groups of connectivity information, and each group comprises: one or more adapters, and one or more ODUk link interfaces. information for indicating connectivity between the adapter and the OCh layer link interface, and information for indicating connectivity between the adapter and the ODUk layer link interface; wherein the information for indicating an adapter capability of the adapter comprises adapter capability descriptions of multiple adapter sets, and each set comprises: one or more adapters, one or more wavelengths and one interface adapting capability description, IACD; information for indicating connectivity between an input direction of the adapter and the OCh layer link interface comprises multiple groups of connectivity information, and each group comprises: one or more OCh layer input interfaces, and one or more adapters; information for indicating connectivity between an output direction of the adapter and the OCh layer link interface comprises multiple groups of connectivity information, and each group comprises one or more adapters, and one or more OCh link input interfaces; information for indicating connectivity between the adapter and the ODUk layer link interface comprises multiple groups of connectivity information, and each group comprises: one or more adapters, and one or more ODUk link interfaces.