US PATENT SUBCLASS 379 / 229
.~ Interexchange signalling

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

219  DF  PLURAL EXCHANGE NETWORK OR INTERCONNECTION {6}
229.~ Interexchange signalling {6}
230  DF  .~.~> Signalling path distinct from trunk (e.g., CCIS)
231  DF  .~.~> Central office-to-PBX signalling {2}
234  DF  .~.~> PBX to central office signalling (e.g., direct outward dialing)
235  DF  .~.~> Voice frequency signalling over trunk
236  DF  .~.~> D.C. signalling over trunk {1}
240  DF  .~.~> Interexchange trunk circuit {1}

DEFINITION

Classification: 379/229

Interexchange signalling:

(under subclass 219) Subject matter including transmission of control or supervisory signals between exchanges.