US PATENT SUBCLASS 379 / 203
.~.~ Operator control

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

201  DF  SPECIAL SERVICES {9}
202  DF  .~ Conferencing {3}
203.~.~ Operator control

DEFINITION

Classification: 379/203

Operator control:

(under subclass 202) Subject matter wherein the conferencing connection is performed by an attendant at a central switching office.