US PATENT SUBCLASS 379 / 286
.~.~.~.~ Signal processing (e.g., dial pulse analysis)

Current as of: June, 1999
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379 /   HD   TELEPHONIC COMMUNICATIONS

242  DF  CENTRALIZED SWITCHING SYSTEM {15}
258  DF  .~ Switching controlled in response to called station addressing signal {9}
268  DF  .~.~ Having shared or common switching control {8}
280  DF  .~.~.~ Including registering or storing device for call address signal {7}
286.~.~.~.~ Signal processing (e.g., dial pulse analysis)

DEFINITION

Classification: 379/286

Signal processing (e.g., dial pulse analysis):

(under subclass 280) Subject matter wherein the call signal storage device or associated circuitry modifies the call address signal.