Method and apparatus for selectively terminating current in a digital subscriber line (DSL) modem
First Claim
1. A system for use in providing digital subscriber line (DSL) service, the system comprising:
- a DSL modem;
a current terminating device housed within the modem; and
, a control module operative to control the current terminating device.
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Accused Products
Abstract
A method and apparatus for selectively terminating sealing current in an asymmetric digital subscriber line modem is provided. The technique comprises providing a mechanism (e.g., a resistor or suitable current sink) to a DSL modem (e.g. an ADSL modem or any XDSL modem used where POTS is underlying service). The mechanism is operable to be dynamically switched on and off and to operate under low current conditions. The system allows for provision of DSL (e.g., ADSL or XDSL where POTS is the underlying current) in the absence of plain old telephone service (POTS) and for improved performance.
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Citations
17 Claims
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1. A system for use in providing digital subscriber line (DSL) service, the system comprising:
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a DSL modem;
a current terminating device housed within the modem; and
,a control module operative to control the current terminating device. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method comprising:
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transmitting a first message to a DSL modem, the first message including data to activate a current terminating device;
activating the current terminating device based on the first message;
sending a sealing current to the current terminating device through copper lines;
transmitting a second message to the DSL modem the second message including data to deactivate the terminating device; and
,deactivating the current terminating device based on the second message.
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9. An apparatus comprising:
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means for transmitting a first message to a DSL modem, the first message including data to activate a current terminating device;
means for activating the current terminating device based on the first message;
means for sending a sealing current to the current terminating device through copper lines;
means for transmitting a second message to the current terminating device, the second message including data to deactivate the terminating device; and
,means for deactivating the current terminating device based on the second message.
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10. A method comprising:
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querying to determine if plain old telephone service (POTS) is available in a customer premises;
determining if a current terminating device is available in a digital subscriber line (DSL) modem associated with the premises if the plain old telephone service (POTS) is not available; and
controlling the current terminating device if it is available. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification