Telecommunication system, method and subscriber unit for use therein
First Claim
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1. A subscriber unit for connection with a public switched telephone network having at least one switch and at least one digital subscriber line in communication with the switch, the digital subscriber line capable of sending and receiving a plurality of data packets, the subscriber unit operable to send and receive voice calls over the public switched telephone network, the subscriber unit comprising:
- a digital subscriber line interface unit, in communication with the digital subscriber line, for receiving the plurality of data packets from the digital subscriber line, for identifying selected ones of the plurality of received data packets corresponding to a received data stream of a first derived digital telephone line, and for transmitting, on the digital subscriber line, a plurality of transmitted data packets corresponding to a transmitted data stream of the first derived digital telephone line;
a coder/decoder, in communication with the digital subscriber line interface unit, for receiving the transmitted data stream, for coding the transmitted data stream into the plurality of transmitted data packets, for receiving the plurality of received data packets and for decoding the plurality of received data packets into the received data stream;
an analog-to-digital converter, in communication with the coder/decoder, for converting a transmitted analog signal into the transmitted data stream;
a digital-to-analog converter, in communication with the coder/decoder, for converting the received data stream into a received analog signal; and
an user interface unit, in communication with the analog-to-digital converter and the digital-to-analog converter, for providing an interface to a user of the subscriber unit, and for generating the transmitted analog signal and for generating an acoustic signal based on at least a portion of the received analog signal.
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Abstract
A telecommunication system includes a digital switch, a local loop coupling the digital switch to a subscriber location, wherein a segment of the local loop includes copper twisted pair and wherein an asymmetrical digital subscriber line is carried by the local loop, the asymmetrical digital subscriber line including a plurality of data packets capable of carrying a plurality of derived digital telephone lines. The telecommunication system further includes a subscriber unit coupled to the asymmetrical digital subscriber line. The subscriber unit monitors the content of at least one of the plurality of data packets, receives an off-hook signal in response to an action of a user, and initiates a first derived digital telephone line of the plurality of derived digital telephone lines in response to the off-hook signal.
124 Citations
64 Claims
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1. A subscriber unit for connection with a public switched telephone network having at least one switch and at least one digital subscriber line in communication with the switch, the digital subscriber line capable of sending and receiving a plurality of data packets, the subscriber unit operable to send and receive voice calls over the public switched telephone network, the subscriber unit comprising:
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a digital subscriber line interface unit, in communication with the digital subscriber line, for receiving the plurality of data packets from the digital subscriber line, for identifying selected ones of the plurality of received data packets corresponding to a received data stream of a first derived digital telephone line, and for transmitting, on the digital subscriber line, a plurality of transmitted data packets corresponding to a transmitted data stream of the first derived digital telephone line;
a coder/decoder, in communication with the digital subscriber line interface unit, for receiving the transmitted data stream, for coding the transmitted data stream into the plurality of transmitted data packets, for receiving the plurality of received data packets and for decoding the plurality of received data packets into the received data stream;
an analog-to-digital converter, in communication with the coder/decoder, for converting a transmitted analog signal into the transmitted data stream;
a digital-to-analog converter, in communication with the coder/decoder, for converting the received data stream into a received analog signal; and
an user interface unit, in communication with the analog-to-digital converter and the digital-to-analog converter, for providing an interface to a user of the subscriber unit, and for generating the transmitted analog signal and for generating an acoustic signal based on at least a portion of the received analog signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 49, 50, 51, 52, 53)
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27. A telecommunication system comprising:
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a digital switch;
a local loop coupling the digital switch to a subscriber location, a segment of the local loop including copper twisted pair;
an asymmetrical digital subscriber line carried by the local loop, the asymmetrical digital subscriber line comprising a plurality of derived digital telephone lines; and
a subscriber unit, coupled to the asymmetrical digital subscriber line, for accessing and monitoring the plurality of derived digital telephone lines and for conducting a voice call over at least one of the derived digital telephone lines.
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48. A subscriber interface unit for use in a telecommunication system including a digital switch, a local loop coupling the digital switch to a subscriber location, wherein a segment of the local loop includes copper twisted pair and wherein an asymmetrical digital subscriber line is carried by the local loop, the asymmetrical digital subscriber line a plurality of derived digital telephone lines, the subscriber interface unit for coupling the asymmetrical digital subscriber line to an analog land-line telephone, the subscriber interface unit comprising:
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a housing having a top surface and a bottom surface substantially coplanar to the top surface;
an electrical coupler, coupled to the housing for connection to a cable carrying the asymmetrical digital subscriber line;
an RJ-11 jack, coupled to the housing, for connection to a cable of the analog telephone; and
a converter, coupled to the electrical coupler and to the RJ-11 jack, for converting the first analog signals generated by the analog telephone into a first plurality of data packets for transmission to a selected one of the plurality of derived digital telephone lines and for converting a second plurality of data packets received from the selected one of the plurality of derived digital telephone lines into a second analog signal for transmission to the analog telephone.
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54. A method for use in a telecommunication system including a digital switch, a local loop coupling the digital switch to a subscriber location, wherein a segment of the local loop includes copper twisted pair and wherein an asymmetrical digital subscriber line is carried by the local loop, the asymmetrical digital subscriber line including a plurality of data packets capable of carrying a plurality of derived digital telephone lines, the telecommunication system further comprising a subscriber unit coupled to the asymmetrical digital subscriber line, the method comprising the steps of:
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monitoring, at the subscriber unit, the content of at least one of the plurality of data packets;
determining, at the subscriber unit, that a first derived digital telephone line is in use based on the content of the at least one of the plurality of data packets; and
generating a line-in-use signal, at the subscriber unit, indicating a first derived digital telephone line is in use. - View Dependent Claims (55, 56, 57, 58, 59)
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60. A method for use in a telecommunication system including a digital switch, a local loop coupling the digital switch to a subscriber location, wherein a segment of the local loop includes copper twisted pair and wherein an asymmetrical digital subscriber line is carried by the local loop, the asymmetrical digital subscriber line including a plurality of data packets capable of carrying a plurality of derived digital telephone lines, the telecommunication system further comprising a subscriber unit coupled to the asymmetrical digital subscriber line, the method comprising the steps of:
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receiving an off-hook signal, generated by the subscriber unit in response to an action of a user; and
initiating a first derived digital telephone line of the plurality of derived digital telephone lines in response to the off-hook signal. - View Dependent Claims (61, 62, 63, 64)
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Specification
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Current AssigneeSBC Properties, L.P.
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Original AssigneeAmeritech Corp. (AT&T, Inc.)
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InventorsBossemeyer, Robert Wesley Jr., Stuckman, Bruce Edward, Pickard, Michael Steven, Neumann, Jeffrey, Kagan, Denise Violetta, Gorman, Michael George, Goering, Scott Christopher, Tisiker, Michael, Orwick, David
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Granted Patent
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Time in Patent OfficeDays
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Field of Search
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US Class Current370/352
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CPC Class CodesH04M 1/2535 adapted for voice communica...H04M 1/56 Arrangements for indicating...H04M 1/57 Arrangements for indicating...H04M 1/715 using two or more extension...H04M 7/0069 comprising a residential ga...
