US PATENT SUBCLASS 379 / 220
.~ With interexchange network routing

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

219  DF  PLURAL EXCHANGE NETWORK OR INTERCONNECTION {6}
220.~ With interexchange network routing {1}
221  DF  .~.~> Alternate routing

DEFINITION

Classification: 379/220

With interexchange network routing:

(under subclass 219) Subject matter for selecting one of plural paths for a call switched between two or more exchanges.