17 October 2005
Source:
http://appft1.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2F
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=DN/20040179513&RS=DN/20040179513
United States Patent Application 20040179513
Kind Code A1
Smith, David B. ; et al. September 16, 2004
Controllable telecommunications switch reporting compatible with voice grade
lines
Abstract
Data generated at a telecommunications network switching node is selectively
delivered to one or more data receiving device (e.g., data "collection box")
connected to the network, and command and control signaling is transmitted
from the data receiving device to the switching node. This bi-directional
communication is carried out in a manner compatible with voice grade lines.
In an exemplary application, call identifying information, referred to in
the TIA/EIA Standard as CDC (Call Data Channel) Messages, is delivered from
an Intercept Access Point (IAP) switch that provides telephone service to a
subject of an authorized surveillance order, to a law enforcement data
collection box, utilizing Frequency Shift Keying (FSK) signals. Control
signals are sent from the data collection box to the IAP switch utilizing
Dual Tone Multi-Frequency (DTMF) signaling. The state of the art is
advanced, and a contribution is made to law enforcement and other fields, as
the invention allows replacement of costly and lengthily provisioned data
delivery circuits, such as ISDN lines or private digital data circuits, with
widely available and less expensive voice-band data delivery equipment.
Inventors: Smith, David B.; (Hinsdale, IL) ; Smith, Matthew Richard;
(Hinsdale, IL) ; Yarbrough, David L.; (Reston, VA) ; Kampmeier, Eric Edward;
(Sycamore, IL) ; Oh, Simon S.; (Naperville, IL) ; Loos, Thomas J.; (Lisle,
IL)
Correspondence Name and Address:
BANNER & WITCOFF
1001 G STREET N W
SUITE 1100
WASHINGTON
DC
20001
US
Assignee Name and Adress: Government of the United States of America
Federal Bureau of Investigation
Washington
DC
Serial No.: 387554
Series Code: 10
Filed: March 14, 2003
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