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. 28, 2001
Filed:
Aug. 31, 2000
Heinz Krimmel, Korntal-Münchingen, DE;
Alcatel, Paris, FR;
Abstract
In a hybrid fiber/coax access network (NET) with a forward channel and a return channel, the return channel serves to transmit voice and video signals as well as data signals from groups of terminals (NT,; NT,) to a subcenter (HUB). Access by a group of terminals (NT,; NT,) to a shared electric line (KOAX,; KOAX,) is obtained by TDMA, FDMA, or CDMA, for example. An optical network termination unit (ONU) is connected to one or more electric lines (KOAX,; KOAX,). For each line or for each separate frequency range of the return channel, the optical network termination unit (ONU) contains an analog-to-digital converter (A/D,, A/D,) which digitizes the received signal. If two or more analog-to-digital converters (A/D,, A/D,) are provided, the individual digitized signals are multiplexed in a multiplexer (MUX) and then fed to a digital electrical-to-optical transducer (E/O,). The electrical-to-optical transducer (E/O,) converts the multiplexed signals to optical signals, which are then transmitted over an optical cable (FIBRE) to the subcenter (HUB), where they are processed digitally.