US PATENT SUBCLASS 379 / 260
.~.~ With operator position or completion of call (e.g., dial "O", semiautomatic)

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.~.~ With operator position or completion of call (e.g., dial "O", semiautomatic) {4}
261  DF  .~.~.~> Operator controlled register-sender
262  DF  .~.~.~> Call extension by operator {2}
265  DF  .~.~.~> Call distribution to operator {1}
267  DF  .~.~.~> Operator's console

DEFINITION

Classification: 379/260

With operator position or completion of call (e.g., dial "0", semi-automatic):

(under subclass 258) Subject matter where intervention by a human operator is necessary in order to complete at least some telephone calls.

(1) Note. There must be a called station addressing signal (e.g., dial pulses) included in order to classified here.

(2) Note. Some examples of semi-automatic systems are: Operator dialed calls and calls dialed at a terminal which cause a visible indication of the called station's number at a manual operator's position.

SEE OR SEARCH THIS CLASS, SUBCLASS:

308, through 332, for centralized switching systems having human operators without a called station signal.