US PATENT SUBCLASS 379 / 314
.~.~ Auxiliary (e.g., overflow)

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

242  DF  CENTRALIZED SWITCHING SYSTEM {15}
313  DF  .~ Multiple section switchboard {1}
314.~.~ Auxiliary (e.g., overflow)

DEFINITION

Classification: 379/314

Auxiliary (e.g., overflow):

(under subclass 313) Subject matter in which a switchboard has an additional section which is used primarily when the capacity of the other sections is exceeded.