The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 29, 2004
Filed:
Jan. 07, 2000
Applicant:
Inventors:
John B. Wilkes, Jr., Harvest, AL (US);
Steven M. Robinson, Madison, AL (US);
Assignee:
Adtran, Inc., Huntsville, AL (US);
Primary Examiner:
Int. Cl.
CPC ...
H04M 1/00 ; H04M 9/00 ; H04M 9/08 ;
U.S. Cl.
CPC ...
H04M 1/00 ; H04M 9/00 ; H04M 9/08 ;
Abstract
A 'lifeline' POTS back-up mechanism is operative to provide emergency plain old telephone service connectivity over a span-powered two-wire metallic digital subscriber loop pair, in response to a customer's phone going off-hook, during a lack of normal operating condition of the digital circuit path. A ground fault interruption signal is generated in a remote terminal and used to activate respective POTS by-pass paths in the remote terminal and a central office terminal.