US PATENT SUBCLASS 379 / 278
.~.~.~.~ Interstage junctor or "trunk"

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}
271  DF  .~.~.~ Having multistage switching {2}
278.~.~.~.~ Interstage junctor or "trunk"

DEFINITION

Classification: 379/278

Interstage junctor or "trunk":

(under subclass 271) Subject matter including a circuit connecting the stages of multistage switching equipment.