Eric T Chang

US Patent:

7477623, Jan 13, 2009

Filed:

Feb 10, 2005

Appl. No.:

11/055183

Inventors:

Eric C. Chang - Plano TX, US

Assignee:

Santera Systems, Inc. - Plano TX

International Classification:

H04Q 7/00

US Classification:

370329, 370437

Abstract:

Methods, systems, and computer program products for caching and reusing bearer channels for voice over packet sessions involving wireless entities are disclosed. According to one method, a setup request message is received for a voice over packet session involving a wireless entity. In response to the setup request message, a bearer channel is established using bearer channel setup signaling. When the first session is released, the bearer channel is cached for a predetermined time period. A second setup request message is received. The second setup request message involves the first and second nodes and a wireless entity. In response to the second setup request message, the cached bearer channel is re-used for the second session.

US Patent:

7792150, Sep 7, 2010

Filed:

Aug 19, 2005

Appl. No.:

11/207572

Inventors:

Weisheng Chen - Allen TX, US
Eric C. Chang - Plano TX, US

Assignee:

Genband US LLC - Plano TX

International Classification:

H04J 3/18

US Classification:

370477, 370401

Abstract:

Methods, systems, and computer program products for providing transcoder-free operation in a media gateway are disclosed. In one method, first and second lists of media encoding rates and corresponding indices used by first and second media endpoints of a media stream connection are received. It is determined whether transcoder-free operation is possible for the media stream connection based on the first and second lists. In response to determining that transcoder-free operation is possible for the media stream connection, a transcoder-free connection is established in the media gateway between the first and second endpoints using a single digital signal processor to monitor and map between indices and encoding rates used by the first and second endpoints during the media stream connection.

US Patent:

7940772, May 10, 2011

Filed:

May 26, 2005

Appl. No.:

11/138990

Inventors:

Jinshui Liu - Plano TX, US
Weisheng Chen - Allen TX, US
Eric Chien-Chung Chang - Plano TX, US
Yen Shei - Plano TX, US
David Z. Lu - Dallas TX, US

Assignee:

Genband US LLC - Plano TX

International Classification:

H04L 12/28

US Classification:

3703951

Abstract:

The subject matter described herein includes methods, systems, and computer program products for transporting ATM cells in a device having an Ethernet switching fabric. According to one method, at least one ingress ATM cell is received at an ATM network interface of a device having an Ethernet switching fabric. Next, the connection associated with which the ingress ATM cell is identified. The ATM cell is encapsulated in Ethernet frame addressed to a media processing resource associated with the connection. The Ethernet frame is forwarded to the media processing resource across an Ethernet switching fabric.

US Patent:

8011130, Sep 6, 2011

Filed:

Jul 6, 2007

Appl. No.:

11/774210

Inventors:

Eric E. Chang - Dallas TX, US
Terrance L. Eck - Plano TX, US
Richard L. Scott - The Colony TX, US

Assignee:

Raytheon Company - Waltham MA

International Classification:

F41G 1/387

US Classification:

42124, 89 4117

Abstract:

An apparatus generally includes a gun mount portion and a sight mount portion that are coupled together by a resilient member. The gun mount portion provides attachment to a gun and the sight mount portion provides attachment to a gun sight. The resilient member is configured to allow, when attached to the gun, a linear displacement of the sight mount portion relative to the gun mount portion along a longitudinal axis of the gun.

US Patent:

8213414, Jul 3, 2012

Filed:

Feb 21, 2006

Appl. No.:

11/358944

Inventors:

Hao Hou - Plano TX, US
Philip Abraham - Allen TX, US
Eric Chien-Chung Chang - Plano TX, US
Heriberto Aguirre - Plano TX, US

Assignee:

Genband US LLC - Plano TX

International Classification:

H04B 7/212
H04M 11/00

US Classification:

370352, 370442, 379 9001

Abstract:

The subject matter described herein includes methods, systems, and computer program products for providing TDM terminating services in a packet network. According to one method, a combined set including a plurality of TDM channels is received over a packet network. The combined set of TDM channels is terminated in the packet network as a combined TDM facility. Terminating the TDM channels as a combined TDM facility may include providing at least one terminating TDM service for the TDM channels, such as performing CAS signaling or providing a PRI interface for the TDM channels.

US Patent:

20220235845, Jul 28, 2022

Filed:

Nov 11, 2021

Appl. No.:

17/454500

Inventors:

- Waltham MA, US
Eric E-Lee Chang - McKinney TX, US
Kirk A. Miller - Dallas TX, US

International Classification:

F16F 15/04
F16F 15/02

Abstract:

A vibration isolator, system, and method for minimizing propagation of vibrations between structures are configured to decouple axial and lateral structural modes. The vibration isolator includes an axial flexural support that provides axial compliance relative to a central axis and a lateral elastomeric support that provides lateral compliance relative to the central axis. The axial flexural support and the lateral elastomeric support provide stiffness about the central axis. The vibration isolator includes a first mount coupled to a first external structure and a second mount coupled to a second external structure. The axial flexural support is coupled to the first mount and the lateral elastomeric support is coupled to the second mount and the axial flexural support. Using an axial flexural support and a lateral elastomeric support enables tuning of the structural modes in one axis while minimizing the effects to the structural modes in the orthogonal axes.

US Patent:

20210215223, Jul 15, 2021

Filed:

May 18, 2020

Appl. No.:

16/877344

Inventors:

- Waltham MA, US
Eric E-Lee Chang - Dallas TX, US

International Classification:

F16F 15/02
F16F 7/12
B60P 7/16

Abstract:

A shock isolator assembly comprises a base a platform and a plurality of self-resetting buckling isolators providing a three-stage response to a dynamic load acting between the base and the platform. The three-stage response of the self-resetting buckling isolators comprises a tension stage when the dynamic load exceeds a threshold tension load, a compression stage when the dynamic load exceeds a threshold compression load, and a rigid stage when the dynamic load is below the threshold tension load and the threshold compression load.