Jason J Bridges

US Patent:

20030235222, Dec 25, 2003

Filed:

Jun 21, 2002

Appl. No.:

10/177284

Inventors:

Jason Bridges - Harvest AL, US
Jason Gastler - Ardmore AL, US
Charles Wilson - Huntsville AL, US

Assignee:

ADTRAN, INC - Huntsville AL

International Classification:

H04J003/02

US Classification:

370/542000

Abstract:

At a transmit site of an inverse multiplexing system, an input demultiplexer demultiplexes high bandwidth serial communication signals (e.g., fractional Trate signals) into communication signal packets for transmission over reduced bandwidth serial communication (e.g. T) channels. A multiplexer for each channel combines successive packets of demultiplexed signals with bits of multibit packet reassembly control words that identify the channel and the order in which communication signal packets have been demultiplexed, to produce successive frames for transmission over the channel. At a receiver site the control words are extracted from the frames of data and analyzed to control reassembly of the serial data packets into their original order.

US Patent:

20050166002, Jul 28, 2005

Filed:

Jan 26, 2004

Appl. No.:

10/764770

Inventors:

David Wallace - Toney AL, US
Jones Allison - Madison AL, US
Jason Bridges - Harvest AL, US

Assignee:

ADTRAN, INC. - HUNTSVILLE AL

International Classification:

G06F012/14

US Classification:

711100000

Abstract:

An electronic signal processing apparatus contains a security key memory. Unless the security key memory contains a prescribed security key, a user is unable to operate the electronic signal processing apparatus. An intrusion detection and protection mechanism prevents access to the security key in the event of a compromise in the integrity of a housing for the security key memory. For this purpose, an intrusion detection circuit is adapted to monitor the integrity of the housing. A memory contents modification circuit is operative, in response to the intrusion detection circuit detecting a compromise in the integrity of the housing (opening of the housing), to modify (e.g., scramble) the contents of the security key memory and thereby effectively remove the security key from the security key memory.