US PATENT SUBCLASS 379 / 251
.~ With generating of call associated substation signal

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


379 /   HD   TELEPHONIC COMMUNICATIONS

242  DF  CENTRALIZED SWITCHING SYSTEM {15}
251.~ With generating of call associated substation signal {3}
252  DF  .~.~> For alerting signal at called station (e.g., ringing) {3}
256  DF  .~.~> Having automatic or through ringing
257  DF  .~.~> For calling station (e.g., status or progress tones)

DEFINITION

Classification: 379/251

With generating of call associated substation signal:

(under subclass 242) Subject matter which generates and transmits a signal to a substation which indicates the presence of, or result of, a call attempt.

SEE OR SEARCH THIS CLASS, SUBCLASS:

315+, for signalling to an operator at a switching facility.

372+, for line signalling received at substation.

418, for call signal generating, per se.