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:
Dec. 21, 1982
Filed:
Jan. 07, 1981
Gilbert L Bargeton, Paris, FR;
Claude P Beynie, La Varenne, FR;
Societe Anonyme de Telecommunications, Paris, FR;
Abstract
The system triggers the relief of a working line amongst N working lines in a bidirectional digital transmission link having at least one spare line. The link is interconnected between two end stations (A, B) which allow a switch-over between a faulty working line and a spare line. The relief of a working line is triggered in response to the detection of an alarm indication signal (AIS) delivered by any end or intermediary terminal included in the working line. An AIS coming from outside the link and related to the working line is detected in an end station and replaced by a switching inhibiting signal that is transmitted via the working line, or perhaps via a spare line, should the working line be faulty and previously relieved, and that is detected in the other station and then replaced by an AIS transmitted outside the link in relation to the other station.