Communication system architecture, exchange having a plurality of broadband modems and method of supporting broadband operation on a one to one basis
First Claim
1. A communication system comprising:
- an exchange having a plurality of broadband modems;
a distribution point coupled to the exchange over an optical communication resource that carries encoded broadband data; and
a plurality of subscriber terminals coupled to the distribution point via individual copper drops, at least some of the plurality of subscriber terminals containing a broadband modem arranged, on an individual basis, to communicate, over respective broadband channels, bi-directional encoded broadband data with a selected broadband modem in the exchange via the distribution point and over a combination of the optical communication resource and the copper drops.
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Accused Products
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).
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Citations
19 Claims
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1. A communication system comprising:
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an exchange having a plurality of broadband modems; a distribution point coupled to the exchange over an optical communication resource that carries encoded broadband data; and a plurality of subscriber terminals coupled to the distribution point via individual copper drops, at least some of the plurality of subscriber terminals containing a broadband modem arranged, on an individual basis, to communicate, over respective broadband channels, bi-directional encoded broadband data with a selected broadband modem in the exchange via the distribution point and over a combination of the optical communication resource and the copper drops. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of transferring encoded broadband data between an exchange having a plurality of broadband modems and a subscriber terminal containing a broadband modem arranged to communicate, over respective broadband channels, bi-directional encoded broadband data with a selected one of the plurality of broadband modems in the exchange, the encoded broadband data communicated between the exchange and the subscriber terminal via a distribution point that is coupled to the exchange via an optical fibre and which is coupled to the subscriber terminal via a copper-drop, the method comprising the steps of:
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modulating onto the optical fibre encoded broadband data addressed to the subscriber terminal at the exchange; decoding the encoded broadband data addressed to the subscriber terminal at the subscriber terminal; modulating onto the optical fibre encoded broadband data addressed to the exchange at the subscriber terminal; and decoding the encoded broadband data addressed to the exchange at the exchange, thereby to provide a one-to-one mapping of broadband modems between the exchange and the subscriber terminal. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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Specification