There is provided a glass substrate which has the properties required in the use as a substrate for an information recording medium of the next generation such as a perpendicular magnetic recording system, and can be applied as a substrate for an information recording medium of the next generation particularly on the premise of using the glass substrate in a dynamic environment. When connection of a new ONU is detected by an ONU apparatus control signal, an IP address is allocated by using the CM apparatus control signal in a manner similar to the CM. The displayed plurality of user interfaces are included in one or more layers and indicate one or more functions among multiple data processing functions that can be performed by the image forming apparatus. The plurality of fluidic paths and microbalances form at least one first and one second reference cells and one first sample cell. A tricuspid annuloplasty ring of the invention has an inner core and an outer band located therearound. The Customer Interface module includes: a customer interface configured to interact with other devices and optical and electrical connectors, connecting at least one of the other optical amplifier modules to the customer interface.