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:
Aug. 17, 1999
Filed:
Jan. 28, 1997
Serge Szczepanowski, Vaureal, FR;
Patrick Janer, Nanterre Cedex, FR;
Xavier Roubinet, Rueil Malmaison, FR;
Alcatel Telspace, Nanterre Cedex, FR;
Abstract
The invention concerns a method of transmitting data reliably over N normal channels (3), where N.gtoreq.1, and over at least one back-up channel (4), between a transmit end station (1) and a receive end station (2), the data transmitted comprising both traffic data and supervisory data. According to the invention, the following successive steps are performed in said transmit end station (1): the traffic data and the supervisory data applied to each of the N pairs of inputs are multiplexed on a respective one of the N normal channels; then, the multiplexed data from a 'backed-up' one of the N normal channels is switched to the back-up channel. The following successive steps are performed in the receive end station (2): the multiplexed data from the back-up channel is interchanged with the multiplexed data from the backed-up normal channel; then the traffic data and the supervisory data on each of the N normal channels are demultiplexed so as to make the data available at a respective one of the N pairs of outputs.