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:
Jul. 29, 2003
Filed:
May. 07, 1999
Rajeshkumar Dahyabhai Patel, Naperville, IL (US);
Paul Daniel Wolfson, Buffalo Grove, IL (US);
Lucent Technologies Inc., Murray Hill, NJ (US);
Abstract
An emergency call monitor ( ) monitors the progression of a call in a telephone switching system. The sequence of called digits for a call is detected by a line/trunk interface unit ( ). A call-type processor ( ) determines whether the call is an emergency call by examining the sequence of called digits and examining a call-type associated with the call. If the call is an emergency call, then a call monitor ( ) is initiated to monitor the progression of the call through the telephone switch. If errors are encountered during the call, an alarm ( ), including a visual and/or audible indicator, is asserted.