US PATENT SUBCLASS 379 / 196
.~ At switching center

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

188  DF  CALL OR TERMINAL ACCESS ALARM OR CONTROL {5}
196.~ At switching center {2}
197  DF  .~.~> Central office
198  DF  .~.~> PBX

DEFINITION

Classification: 379/196

At switching center:

(under subclass 188) Subject matter wherein the call restriction function or generation of the alerting signal is performed at a switching station remote from a user terminal.