Rajeshkumar D Patel

US Patent:

6600811, Jul 29, 2003

Filed:

May 7, 1999

Appl. No.:

09/306952

Inventors:

Rajeshkumar Dahyabhai Patel - Naperville IL
Paul Daniel Wolfson - Buffalo Grove IL

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

H04M 1104

US Classification:

379 45, 379 37, 379 47, 379134

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.