LandOfFree - US Patents - Listing for Telephonic communications,Diagnostic testing, malfunction indication, or electrical...,Of trunk or long line

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Design and architecture of an impairment diagnosis system...

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Of trunk or long line

Reexamination Certificate

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Detecting make-break clicks on a telephone line

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Of trunk or long line

Patent

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Detection of bridge taps by frequency domain...

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Of trunk or long line

Reexamination Certificate

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Detection of bridged taps by frequency domain reflectometry

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Of trunk or long line

Reexamination Certificate

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Determining the composition of subscriber loops from...

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Of trunk or long line

Reexamination Certificate

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Digital facility simulator with CODEC emulation

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Of trunk or long line

Reexamination Certificate

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Digital key telephone system and extension terminal device...

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Of trunk or long line

Reexamination Certificate

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Digital kick meter and graphical user interface (GUI)

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Of trunk or long line

Reexamination Certificate

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Digital measurement of amplitude and phase of a sinusoidal signa

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Of trunk or long line

Patent

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Digital telephone link margin verification

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Of trunk or long line

Reexamination Certificate

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Direct access test unit for central office

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Of trunk or long line

Patent

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Display panel overlay structure and method for tracing...

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Of trunk or long line

Reexamination Certificate

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