Patent ID: 7577147

Claim:
A transparent transmission method for administrative information of optical synchronous digital hierarchy (SDH) devices of multi-vendors, comprising: putting, by a first device in a first subnet connected to a backbone network, administrative information of the first device into a designated area of a first Synchronous Transfer Mode (STM-N) frame, the first device being manufactured by a vendor which is not the vendor manufacturing a SDH device in the backbone network; sending, by the first device, the first STM-N frame to the SDH device in the backbone network, and then extracting, by the SDH device, the administrative information from the first STM-N frame, and sending a second STM-N frame including the administrative information to a second device in a destination subnet through the backbone network; after extracting the administrative information from the first STM-N frame, transforming, by the SDH device in the backbone network, the administrative information to a standard format, and then performing time slot cross to define a transmission direction of the administrative information; and performing a second format transformation for the once-transformed administrative information and inserting the twice-transformed administrative information into the second STM-N frame of a designated line after the second format transformation, and then transferring the second STM-N frame to a next designated node.