US PATENT SUBCLASS 379 / 201
SPECIAL SERVICES

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

201SPECIAL SERVICES {9}
202  DF  .~> Conferencing {3}
207  DF  .~> At plural exchanges
208  DF  .~> Priority override (e.g., butt-in)
209  DF  .~> Repetitive call attempts (e.g., camp-on-busy, retry)
210  DF  .~> Call diversion (e.g., call capture) {4}
215  DF  .~> Call waiting
216  DF  .~> Abbreviated dialing or direct call (e.g., hot line)
217  DF  .~> Audible paging
218  DF  .~> Performed by operator (e.g., butt-in, busy verification)

DEFINITION

Classification: 379/201

SPECIAL SERVICES:

(under the class definition) Subject matter including a switching, connection, or control function additional to those necessary to establish and maintain a single call connection between two stations.

(1) Note. These services generally involve three or more stations or two or more call connections.

(2) Note. Examples of such special services are conferencing, abbreviated dialing, call forwarding or transfer, paging, call waiting, and special networks.

SEE OR SEARCH THIS CLASS, SUBCLASS:

157+, for this subject matter in a key telephone system.

SEE OR SEARCH CLASS

370, Multiplex Communications,

259+, for such special services combined with multiplex switching.