4. Telephonic communications
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Driving stage for driving differential amplifiers of a subscribe

Telephonic communications – Subscriber line or transmission line interface
Patent

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Drop testing in fiber to the home systems

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Testing of subscriber loop or terminal
Patent

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DSL communication method of performing an interruption and a...

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Of data transmission
Reexamination Certificate

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DSL communication system with improved bandwidth

Telephonic communications – Telephone line or system combined with diverse electrical... – Having transmission of a digital message signal over a...
Reexamination Certificate

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DSL compatible load coil

Telephonic communications – Telephone line or system combined with diverse electrical... – Having transmission of a digital message signal over a...
Reexamination Certificate

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DSL integrated call waiting

Telephonic communications – Telephone line or system combined with diverse electrical... – Having transmission of a digital message signal over a...
Reexamination Certificate

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DSL line card echo canceler-based mechanism for locating...

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Of centralized switching system
Reexamination Certificate

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DSL line interface having low-pass filter characteristic...

Telephonic communications – Subscriber line or transmission line interface – Hybrid circuit
Reexamination Certificate

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DSL line tester

Telephonic communications – Subscriber line or transmission line interface
Reexamination Certificate

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DSL modem with management capability

Telephonic communications – Telephone line or system combined with diverse electrical... – Having transmission of a digital message signal over a...
Reexamination Certificate

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DSL protector having a detachable wire interface

Telephonic communications – Subscriber line or transmission line interface – Protective circuit
Reexamination Certificate

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DSL system estimation including known DSL line scanning and...

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Of data transmission
Reexamination Certificate

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DSL system training

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Of data transmission
Reexamination Certificate

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DSL tester

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Of data transmission
Reexamination Certificate

  [ 0.00 ] – not rated yet Voters 0   Comments 0

DSL-ready pots device and method

Telephonic communications – Telephone line or system combined with diverse electrical... – Having transmission of a digital message signal over a...
Reexamination Certificate

  [ 0.00 ] – not rated yet Voters 0   Comments 0

DSP based SLIC architecture with current-sensing voltage...

Telephonic communications – Subscriber line or transmission line interface – Hybrid circuit
Reexamination Certificate

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DSP-enabled amplified telephone with digital audio processing

Telephonic communications – Including aid for handicapped user
Reexamination Certificate

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DTMF control

Telephonic communications – Special services – Call diversion
Reexamination Certificate

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DTMF detection based on LPC coefficients

Telephonic communications – Centralized switching system – Switching controlled in response to called station...
Reexamination Certificate

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DTMF detection for voice processing equipment

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Testing of subscriber loop or terminal
Patent

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