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:
Apr. 03, 2001
Filed:
Nov. 25, 1998
Gregory L. Bella, Naperville, IL (US);
Michael Clegg, Little Abington, GB;
Westell Technologies, Inc., Aurora, IL (US);
Abstract
A network interface device intended to be placed approximate to the customers equipment and remote from a central office of a telephone company (“TELCO”). The purpose of the network interface device is to allow the twisted pair transmission line between the central office and the customer's port to be selectively switched from a normal monitoring mode into a test mode. In the test mode, the NIU transmits a signal back to the central office so that the central office is able to determine whether there are any problems with the transmission line, the potential bandwidth for the transmission line and related parameters concerning the efficacy and suitability of the transmission line for a variety of communication services. A network interface device in accordance with the present invention has a monitor circuit which looks for a request signal from the central office. Upon receipt of the request signal, the detector circuit activates a relay to disconnect the customer equipment from remainder of the system and establishes a connection to a test signal generator and other components of the NIU. A test signal generator outputs onto the transmission line a predetermined signal for analysis. The duration of this signal is controlled by a reset control circuit which toggles the relay to break off connection to the remaining components of the NIU and re-establish the connection between the customer port and the network port for further ADSL communications.