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:
Nov. 20, 2001
Filed:
Nov. 17, 1997
Heinz Krimmel, Korntal-Münchingen, DE;
Rainer Fritschi, Korntal-Münchingen, DE;
Rolf Heidemann, Tamm, DE;
Alcatel, Paris, FR;
Abstract
In a hybrid fiber/coax access network (NET) with downstream and upstream channels, the upstream channel serves to transmit voice and video signals as well as data signals from groups of customer locations (END) to a subcenter (HUB). A demarcation point (UP) provides the interface between the access network (NET) and the private network of the customer location (END). It contains at least two devices (BP,, BP,, BP,) for frequency-splitting received signals in the upstream frequency band, at least two switches (S,, S,, S,) following the at least two devices (BP,, BP,, BP,) and serving to block or unblock individual upstream frequency ranges, a measuring unit (MESS,) for measuring the amplitudes or intensities of the signals in the split frequency ranges, and a control unit (CTRL) for evaluating the measured values and controlling the at least two switches (S,, S,, S,). For a customer location (END), individual upstream frequency ranges can thus be telemetrically blocked for a limited time. Decentralized and autonomous monitoring of individual upstream frequency ranges is accomplished by a measuring unit which is controlled by the demarcation point (UP) itself.