The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 26, 1999
Filed:
May. 16, 1997
Gwan-Joong Kim, Daejeon, KR;
Young-Sun Kim, Daejeon, KR;
Electronics and Telecommunications Research Institute, Daejeon, KR;
Abstract
A maintenance method for a subscriber line of a B-NT in an ATM PVC switching system which is capable of more expanding a maintenance range of an OAM cell loopback function disclosed in the article 2. The method includes the steps of a first step in which a loopback OAM cell is transmitted to a B-NT when the ATM PVC switching system receives a request of a state information of subscriber links of a B-NT from an operator, or a loopback operation timer becomes time-out, a second step in which the B-NT, which receives a loopback OAM cell from the ATM PVC switching system, carries the statement information of subscriber lines of B-NT apparatus on a loopback OAM cell and then transmits the information to the ATM PVC switching system, and a third step in which the ATM PVC switching system, which receives a loopback OAM cell from the B-NT apparatus, stores a state information of subscriber lines into a state management table, reports a state information of subscriber lines to the system operator.