Abstract: Only a limited number of service servers have been provided with the function of feeding back profits obtained through cooperation of multiple service servers to developers of cooperation modules and business entities running the service servers as incentives. In the present invention, a cooperation server for achieving cooperation between the service servers includes: a business entity data storage means for storing business entity data of the respective service servers; a cooperation module storage means for storing cooperation modules used for achieving cooperation between the service servers; a developer data storage means for storing developer data related to developers of the cooperation modules; a cooperation history storage means for storing cooperation history data of the cooperation modules; and an incentive settlement means for performing calculation of amounts of incentives and payment of the incentives.

Abstract: It is the object of the invention to provide an extra ordinariness-discriminating circuit for an optical signal, which discriminates whether an output signal of an optical direct amplifier is a STM one or a signal being other than a STM one, such as ASE noise and etc., and examines the presence of an extraordinary optical signal. A portion of the output signal of the optical direct amplifier is branched by an optical coupler, and converted into an electrical signal by an O/E converter and divided in two. One of divided electrical signals is supplied to a band pass filter, which extracts 8 KHz component to be detected by the first detector, and the other one is directly supplied to the second detector and detected therein. Both the detected voltages are supplied to a comparator.