Simulating changes in telephone subscriber line
First Claim
1. A subscriber unit for providing telephony services to telephony devices on a telephone line coupled to said subscriber unit, said subscriber unit comprising:
- at least one communication interface for communicating with a communications network via a suitable medium;
a primary handset directly interacting with a controller;
a subscriber line interface circuit (SLIC);
at least one jack for coupling said telephone line to said SLIC;
means for altering the direct current (dc) voltage and current limit (VI characteristics) of said telephone line in response to a condition under control of the controller.
11 Assignments
0 Petitions
Accused Products
Abstract
A fixed wireless access subscriber unit containing a wireless transceiver and a telephone subscriber line interface circuit which supports privacy and remote release of hold between the subscriber unit and extension telephones are disclosed. The subscriber unit detects when the primary handset, or an extension telephone set goes off-hook. In response the subscriber unit modifies the voltage and/or current characteristics on the telephone subscriber line which connects the extension sets to the subscriber unit in such a manner that extension sets connected to the telephone subscriber line will sense when the primary handset goes off-hook.
29 Citations
23 Claims
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1. A subscriber unit for providing telephony services to telephony devices on a telephone line coupled to said subscriber unit, said subscriber unit comprising:
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at least one communication interface for communicating with a communications network via a suitable medium; a primary handset directly interacting with a controller; a subscriber line interface circuit (SLIC); at least one jack for coupling said telephone line to said SLIC; means for altering the direct current (dc) voltage and current limit (VI characteristics) of said telephone line in response to a condition under control of the controller.
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2. A subscriber unit for providing telephony services to telephony devices on a telephone line coupled to said subscriber unit, said subscriber unit comprising:
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at least one communication interface for communicating with a communications network via a suitable medium, a subscriber line interface circuit (SLIC); at least one jack for coupling said telephone line to said SLIC; an integrated primary handset not connected to said at least one jack; means for altering the direct current (dc) voltage and current limit (VI characteristics) of said telephone line in response to a condition; and a controller for detecting said condition and controlling said means for altering; wherein said condition includes the status of said primary handset. - View Dependent Claims (3, 4, 5)
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6. A method for simulating changes in the direct current (dc) voltage and current limit (VI characteristics) of a telephone line connected to a subscriber unit, said unit having a controller for directly interacting with a primary handset, and a telephone subscriber line interface, said method comprising the steps of:
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maintaining an open circuit voltage between tip and ring terminals of said telephone subscriber unit when said subscriber unit is in an on-hook idle state; detecting a change in hook status of said primary handset and of an extension set connected to said telephone line; said controller regulating the voltage and current limit on said telephone line in response to a change in hook status of either said primary handset or said extension set.
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7. A method for simulating changes in the direct current (dc) voltage and current limit (VI characteristics) of a telephone line connected to a subscriber unit, said unit having a communications interface for communicating with a communications network, controller for directly interacting with a primary handset, and a subscriber line interface, said method comprising the steps of:
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maintaining an open circuit voltage between the tip and ring terminals of said telephone subscriber unit when said subscriber unit is in an on-hook idle state; detecting a condition; said controller regulating the dc voltage and current limit on said telephone line in response to the condition detected, wherein said condition includes the status of said subscriber unit. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A subscriber unit comprising:
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at least one communication interface for communicating with a communications network via a suitable medium; a primary handset; a subscriber line interface circuit (SLIC); at least one jack coupling a telephone line to said SLIC, said jack including tip and ring terminals; a controller for directly interacting with said primary handset and adapted to carry out the steps of; maintaining an open circuit voltage between the tip and ring terminals of said telephone subscriber unit when said subscriber unit is in an on-hook idle state; detecting a change in hook status of said primary handset and of an extension set connected to said telephone line; regulating the voltage and current limit on said telephone line in response to a change in hook status of either said primary handset or said extension set.
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14. A subscriber unit comprising:
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at least one communication interface for communicating with a communications network via a suitable medium; a primary handset; a subscriber line interface circuit (SLIC); at least one jack coupling a telephone line to said SLIC, said jack including tip and ring terminals; a controller for directly interacting with said primary handset and adapted to carry out the steps of; maintaining an open circuit voltage between the tip and ring terminals of said telephone subscriber unit when said subscriber unit is in an on-hook idle state; detecting a condition; regulating the dc voltage and current limit on said telephone line in response to the condition detected, wherein said condition includes the status of said subscriber unit. - View Dependent Claims (15, 16, 17)
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18. A subscriber unit comprising:
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a primary handset directly interacting with a controller; means for communicating with a communications network via a suitable medium; a subscriber line interface circuit (SLIC); means for coupling a telephone line to said SLIC, said means for coupling including tip and ring terminals; means for maintaining an open circuit voltage between the tip and ring terminals of said telephone subscriber unit when said primary handset is in an on-hook idle state; means for detecting a change in hook status of said primary handset and of an extension set connected to said telephone line; and means for regulating, under the control of said controller, the direct current (dc) voltage and current limit on said telephone line in response to a change in hook status of either said primary handset or said extension set.
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19. A subscriber unit comprising:
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means for communicating with a communications network via a suitable medium; a primary handset directly interacting with a controller; a subscriber line interface circuit (SLIC); means for coupling a telephone line to said SLIC, said means for coupling including tip and ring terminals; means for maintaining an open circuit voltage between the tip and ring terminals of said telephone subscriber unit when said primary handset is in an on-hook idle state; means for detecting a condition; and means for regulating, under the control of said controller, the voltage and current limit on said telephone line in response to the condition detected. - View Dependent Claims (20)
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21. A subscriber unit comprising:
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means for communicating with a communications network via a suitable medium; a subscriber line interface circuit (SLIC); means for coupling a telephone line to said SLIC; an integrated primary handset; a controller for controlling said SLIC to supply a first set of voltage and current (VI) characteristics to said telephone line while said primary handset is on-hook and to supply a second set of VI characteristics to said telephone line while said primary handset is off-hook. - View Dependent Claims (22, 23)
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Specification