US PATENT SUBCLASS 379 / 204
.~.~ Subscriber control

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

201  DF  SPECIAL SERVICES {9}
202  DF  .~ Conferencing {3}
204.~.~ Subscriber control {1}
205  DF  .~.~.~> Conference initiation by single calling station

DEFINITION

Classification: 379/204

Subscriber control:

(under subclass 202) Subject matter wherein the conferencing connection is established or modified by central office switching equipment in response to signalling from a subscriber terminal.