OFFICE-SIDE LINE CONCENTRATOR, ACCESS CONTROLLER, AND COMPUTER PROGRAM THEREFOR

摘要

An office-side line concentrator accommodating a plurality of passive optical networks includes a plurality of reception means connected to each of the passive optical networks and an interface means for controlling the transmission timing of the user data from the passive optical networks so that the user data received by the reception means is closely aligned in an uplink. This provides an office-side line concentrator capable of effectively using a band in the uplink.