US PATENT SUBCLASS 379 / 245
.~ Identification

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

242  DF  CENTRALIZED SWITCHING SYSTEM {15}
245.~ Identification {1}
246  DF  .~.~> Of line or trunk {3}

DEFINITION

Classification: 379/245

Identification:

(under subclass 242) Subject matter at a central switching office for determining which telephone system component is used in a particular call.