US PATENT SUBCLASS 379 / 191
.~.~ 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}
190  DF  .~ Time out {1}
191.~.~ At switching center {2}
192  DF  .~.~.~> Of call duration (e.g., conversation timer)
193  DF  .~.~.~> Of specific equipment

DEFINITION

Classification: 379/191

At switching center:

(under subclass 190) Subject matter wherein a status control or an alerting function is performed at a switching center remote from the terminal.