US PATENT SUBCLASS 379 / 310
.~ Divided central (e.g., communication between switchboards)

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

242  DF  CENTRALIZED SWITCHING SYSTEM {15}
310.~ Divided central (e.g., communication between switchboards) {1}
311  DF  .~.~> Having signalling path feature

DEFINITION

Classification: 379/310

Divided central (e.g., communication between switchboards):

(under subclass 242) Subject matter in which subscriber lines are grouped upon separate switchboards at a switching exchange.

SEE OR SEARCH THIS CLASS, SUBCLASS:

219+, for interexchange signalling.

264, for call extension from an A operator to a B operator.