4. Telephonic communications
  5. Diagnostic testing, malfunction indication, or electrical...
  6. Of trunk or long line

Siemens Business Communication Systems, Inc.

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Analog self-test circuitry for a trunk interface

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

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Apparatus and method for providing a telephone user with control

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection
Patent

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Apparatus and method for providing a user with one telephone num

Telephonic communications – Special services – Call diversion
Patent

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Apparatus for generating alerts of varying degrees

Telephonic communications – Supervisory or control line signaling – Signal reception at substation
Patent

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Apparatus for providing enhanced addressing capability in voice

Telephonic communications – Audio message storage – retrieval – or synthesis
Patent

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