The present invention provides a method, system and apparatus by which TCP connections may be failed-over from one system to another within a highly available network service, and appear transparent to the remote client. Conveyor elements include conducting parts and are movable along the conveyor path through the drive region. The transaction management system has contract DB storing plural sets of contract information each consisting of a user ID, a customer code, an ISP code, an accounted party code specifying carrier, and so on. Upon determining that the criteria is not satisfied, the method provides transferring a first notification to the first client device that includes a first instruction for the first client device to reduce an amount of bandwidth used for transferring the media stream. Due thereto, a shutter device and media transaction device having improved security are provided.