Patent ID: 7835268
Filing Date: 2010-11-16
Classification: H04B,H04J,H04Q

Abstract:
1. An optical termination system comprising: a plurality of Optical Line Terminals (OLTs), each of the plurality of OLTs configured to communicate with a plurality of Optical Network Units (ONUs) through an optical transmission line, and having a control information storage to store control information for each respective plurality of ONUs to control communication with the plurality of ONUs; a standby OLT having a storage capable of storing the control information to be transferred from each of the plurality of OLTs; and a controller to identify control information relating to a plurality of ONUs that communicate with an OLT detected having a fault, to transfer the control information relating to the plurality of ONUs that communicate with an OLT detected having a fault from the OLT having a fault to the standby OLT, to control switching from the OLT having a fault to the standby OLT, and to intermediate transmission of the control information relating to the plurality of ONUs that communicate with an OLT detected having a fault from the OLT having a fault to the standby OLT while maintaining communication of remainder of the plurality of OLTs, other than the OLT having a fault, with respective plurality of ONUs.