Patent ID: 6567516
Filing Date: 2003-05-20
Classification: H04Q

Abstract:
A method of controlling affiliation of a remote line-collection device with a plurality of switches connected via a network, comprising the steps of:providing each switch with a backup-storage area in advance in addition to a normal storage area; transferring control data of the remote line-collection device from the normal storage area of a first switch to the backup-storage area of a second switch when affiliation of the remote line-collection device is changed from the first switch to the second switch; Obtaining differential data between the control data of the remote line-collection device and updated control data of the remote line-collection device when the control data of the remote line-collection device is updated at the second switch; and transferring the differential data from the second switch to the first switch when the affiliation of the remote line-collection device is returned from the second switch to the first switch.