A 622 M MSPR consists of different types of equipment. The IDs of such equipment are 38, 44, 41, 42, and 43 in order. NE 38 is an OptiX 2500+ equipment, NE 44 is an OptiX 155/622H equipment, and all other NEs are OptiX 155/622 equipments. The customer reports that the services of the whole ring are switched over when the 10-SD4-2 optical board on NE 38 fails. The services on NE 44 have been interrupted for nine minutes. The services on all other stations are normal. The NE software version of the OptiX 2500+ is 18.104.22.168. The NE software version of the OptiX 155/622H is 4.02.06.04P01.