US PATENT SUBCLASS 379 / 263
.~.~.~.~ With call indicator or announcer

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}
260  DF  .~.~ With operator position or completion of call (e.g., dial "O", semiautomatic) {4}
262  DF  .~.~.~ Call extension by operator {2}
263.~.~.~.~ With call indicator or announcer

DEFINITION

Classification: 379/263

With call indicator or announcer:

(under subclass 262) Subject matter having means to provide the operator with a visual or sound indication of a desired called station address.