Communication system architecture, exchange having a plurality o

Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via frequency channels

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375260, H04J 100

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active

061480061

ABSTRACT:
To reduce the complexity, size and power dissipation associated with the deployment of xDSL-type modems in distribution points (140-142) of a telecommunications network, a transparent concentrating optical transmission scheme is interposed between an exchange (100) and a subscriber terminal (210). Specifically, xDSL-type modems (102-104 and 220-224) are employed both within the exchange (100) and, nominally each subscriber terminal (210) of the telecommunication system, while an optical fiber supports the transmission of frequency division multiplexed broadband signals sent between the exchange (100) and the distribution points (140-142). Twisted-pairs then couple respective broadband signals received and demultiplexed at the distribution points (140-142) to appropriately addressed subscriber terminals (210), while upstream transmissions are subjected to a complementary process from the xDSL modems (220-224) in the subscriber terminals (210) to the xDSL modems (220-224) in the exchange (100).

REFERENCES:
patent: 5668857 (1997-09-01), McHale
patent: 5768279 (1998-06-01), Barn et al.
patent: 5910970 (1999-06-01), Lu
VII International Workshop on Optical Access Networks Conference Proceedings, Sep. 24-27, 1995, Nuremberg, "Deployment Options for Broadband Networks,"--Jeff Stern, et al.
VII International Workshop on Optical Access Networks Conference Proceedings, Sep. 24-27, 1995, Nuremberg, "Broadband Access Systems: A Comparison of FDM Hybrid/Fiber Coax and TDM Digital Broadband,"--P. Harten, et al.
VII International Workshop on Optical Access Networks Conference Proceedings, Sep. 24-27, 1995, Nuremberg, "A Broadband Multiservice Access System,"--J. L. Joubert, et al.

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