Performs OTU, ODU, OPU overhead/data processing, aligns incoming OTU or ODU frames, and provides overhead interpretation with error detection and performance monitoring. Independent transmit and receive processors with optional external ports for overhead insertion and extraction. Data transferred via 64-bit bus. Supports various system side data rates, line side runs at either OTU2 rate of 167.33Mb/s or ODU2 rate of 156.83Mb/s.Performs OTU, ODU, OPU overhead/data processing, aligns incoming OTU or ODU frames, and provides overhead interpretation with error detection and performance monitoring. Independent transmit and receive processors with optional external ports for overhead insertion and extraction. Data transferred via 64-bit bus. Supports various system side data rates, line side runs at either OTU2 rate of 167.33Mb/s or ODU2 rate of 156.83Mb/s.