US PATENT SUBCLASS 379 / 166
.~ Detail of line circuit or line card

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

156  DF  MULTI-LINE OR KEY SUBSTATION SYSTEM WITH SELECTIVE SWITCHING AND CENTRAL SWITCHING OFFICE CONNECTION {7}
166.~ Detail of line circuit or line card

DEFINITION

Classification: 379/166

Detail of line circuit or line card:

(under subclass 156) Subject matter including a subscriber loop or line circuit or an interchangeable support therefor.

(1) Note. Included herein are circuit boards having features of the subscriber loop or line.