Patent ID: 9179204
Filing Date: 2015-11-03
Classification: H04B,H04Q

Abstract:
1. A station-side termination apparatus comprising: one or more of a plurality of switching source OSUs which connects an arbitrary subscriber termination apparatus, receives an up signal from the stored subscriber termination apparatus and, transmits a down signal to the stored subscriber termination apparatus; a concentration switch which multiplexes the up signals received by the respective switching source OSUs and, outputs the down signal to a storage destination OSU of the subscriber termination apparatus as a transmission destination of the down signal concerned; and a controller which controls the storage destination OSU of each of the subscriber termination apparatuses, wherein when the storage destination OSU of the subscriber termination apparatus is switched from a switching source OSU to a switching destination OSU, the controller transmits, to the concentration switch, such a storage destination change instruction that the storage destination OSU of the subscriber termination apparatus is switched, instructs the switching source OSU to stop transmission of a transmission permission message, and, notifies information of the subscriber termination apparatus to be stored in the switching destination OSU, whereby the concentration switch performs buffering of the down signal to the subscriber termination apparatus having been stored in the switching source OSU, the switching destination OSU having received information of the subscriber termination apparatus performs setting of the subscriber termination apparatus to be stored in the switching destination OSU, when the switching destination OSU completes the setting of the subscriber termination apparatus to be stored in the switching destination OSU, and the controller notifies the concentration switch and the switching destination OSU of completion of switching from the switching source OSU to the switching destination OSU, whereby concentration switch outputs a buffered down signal to the switching destination OSU, and, the switching destination OSU notifies the subscriber termination apparatus to be stored in the switching destination OSU of restart of transmission.