Search

David A Delew

from San Rafael, CA
Age ~60
Get Report
Also known as:
David Allen De, David A De Lew, David Dewlew, David A De
Related to:
Cheri A SankoffDeborah A Delew, 66Sierra M Delew, 30Zack DelewMatthew S Parks, 55Zachary Delew, 32D Zachary Delew
Connected to:
Mark A Delewski, 63Brittany M Deley, 35Deanna M Deley, 30Lisa A Deley, 57Matthew R Deley, 28Thomas L Deley, 65William G Deley, 57Brian E Delf, 63Charles F Delf, 79Heidi K Delf, 68

David Delew Phones & Addresses

  • San Rafael, CA
  • 1970 Sutter St #215, San Francisco, CA 94115
  • Santa Rosa, CA
  • 711 Brett Ave, Rohnert Park, CA 94928
  • Petaluma, CA
  • 20 Northview Ct, San Rafael, CA 94903

Resumes

Resumes

David Delew Photo 1

Senior Electrical Engineer

View page
Location:
20 Northview Ct, San Rafael, CA 94903
Industry:
Industrial Automation
Work:
Singulex
Senior Electrical Engineer
Idex Health and Science Rheodyne Division
Electrical Engineer
Arcturus
Electrical Engineer
Tellabs 1999 - 2009
Staff Engineer
Afc/Tellabs 1999 - 2008
Staff Engineer
Education:
University of Illinois at Urbana - Champaign 1982 - 1987
Bachelors, Bachelor of Science In Electrical Engineering
Skills:
Electronics
Electrical Engineering
Embedded Systems
Embedded Software
Electricians
David Delew Photo 2

Engineer

View page
Location:
San Francisco, CA
Industry:
Telecommunications
Work:
Tellabs
Engineer
David Delew Photo 3

David Delew

View page

Publications

Us Patents

Methods And Apparatus For Identifying A Passive Optical Network Failure

View page
US Patent:
7881607, Feb 1, 2011
Filed:
Sep 1, 2006
Appl. No.:
11/515504
Inventors:
David A. DeLew - Rohnert Park CA, US
Ryan D. Houlgate - Windsor CA, US
Nathan D. Knuth - Sebastopol CA, US
Manic C. Steyn - Penngrove CA, US
Weijun Li - Rohnert Park CA, US
Assignee:
Tellabs Petaluma, Inc. - Naperville IL
International Classification:
H04B 10/08
US Classification:
398 17, 398 22, 398 72, 398 67, 398 63
Abstract:
A method and corresponding apparatus is disclosed for determining a particular Optical Network Terminal (ONT) in a Passive Optical Network (PON) is malfunctioning by sending a continuous stream of light up a shared fiber, which results in adversely affecting communications between the ONT and an Optical Line Terminal (OLT). The example embodiment verifies the failure is due to a faulty optical transmitter in the ONT and not a different network fault, such as a fiber optic line cut or power outage. Through the use of the example embodiment, a service provider can determine in an automated manner which specific ONT of a PON is malfunctioning.

Method And Apparatus For Correcting Faults In A Passive Optical Network

View page
US Patent:
8090258, Jan 3, 2012
Filed:
Sep 19, 2008
Appl. No.:
12/234604
Inventors:
David A. DeLew - Rohnert Park CA, US
Paul E. O'Connor - Grass Valley CA, US
Robert S. Larvenz - Rohnert Park CA, US
Assignee:
Tellabs Petaluma, Inc. - Naperville IL
International Classification:
H04B 10/08
US Classification:
398 22, 398 17, 398 16
Abstract:
Component malfunctions in passive optical networks (PON) can increase bit error rates and decrease signal-to-noise ratio of communications signals. These faults may cause the receivers of the signals, either the optical line terminal (OLT) or optical network terminals (ONTs), to experience intermittent faults and/or may result in misinterpreted commands that disrupt other ONT's communication, resulting in a rogue ONT condition. Existing PON protocol detection methods may not detect these types of malfunctions. An embodiment of the present invention identifies faults in a PON by transmitting a test series of data patterns via an optical communications path from a first optical network node to a second optical network node. The test series is compared to an expected series of data patterns. An error rate may be calculated as a function of the differences between the test series and expected series.

Method And Apparatus For Diagnosing Problems On A Time Division Multiple Network Access (Tdma) Optical Distribution Network (Odn)

View page
US Patent:
8095002, Jan 10, 2012
Filed:
Aug 31, 2006
Appl. No.:
11/514461
Inventors:
Joseph D. Miguel - Petaluma CA, US
David A. DeLew - Rohnert Park CA, US
Assignee:
Tellabs Pataluma, Inc. - Naperville IL
International Classification:
H04B 10/08
US Classification:
398 17, 398 16, 398 15, 398 10, 398 71
Abstract:
A method and corresponding apparatus for diagnosing problems on a time division multiple access (TDMA) optical distribution network (ODN) is provided. An example method may include: (i) measuring no-input signal power level on a communications path configured to carry upstream communications between multiple optical network terminals (ONTs) and an optical line terminal (OLT) in a passive optical network (PON) at a time no upstream communications are on the communications path from the ONTs to the OLT; (ii) comparing the measured no-input signal power level to a threshold; and (iii) generating a notification in an event the threshold is exceeded. Through the use of this method, faults in optical transmitters, such as bad solder joints, can be determined. Such faults may cause errors in parameters, such as ranging or normalization parameters, associated with communications. By determining the faults, the time required to resolve communications errors can be reduced.

Method, Apparatus, System And Computer Program Product For Identifying Failing Or Failed Optical Network Terminal(S) On An Optical Distribution Network

View page
US Patent:
20070201867, Aug 30, 2007
Filed:
May 22, 2006
Appl. No.:
11/419695
Inventors:
David DeLew - Rohnert Park CA, US
Joseph Miguel - Petaluma CA, US
Bernardus Egberts - Petaluma CA, US
Assignee:
Tellabs Petaluma, Inc. - Petaluma CA
International Classification:
H04B 10/08
US Classification:
398038000
Abstract:
An error in a passive optical network is identified by communicating to an optical network terminal on the passive optical network a request to transmit a response signal at a predetermined power level, receiving the response signal in response to the request, and measuring a power level of the response signal. A predetermined channel power level is compared to the power level of the response signal and a status of the optical network terminal is determined based on the result of the comparison.

Method And Apparatus For Rogue Tolerant Ranging And Detection

View page
US Patent:
20070264016, Nov 15, 2007
Filed:
Jan 8, 2007
Appl. No.:
11/651329
Inventors:
David A. DeLew - Rohnert Park CA, US
Assignee:
Tellabs Petaluma, Inc. - Naperville IL
International Classification:
H04J 14/00
US Classification:
398 71
Abstract:
A fault condition of a continuous stream of light up a shared fiber from an Optical Network Terminal (ONT) to an Optical Line Terminal (OLT) may adversely affect ranging of the ONT by the OLT. A method and corresponding apparatus for ranging an ONT tolerant to such a fault condition is disclosed. In an example embodiment, an optical receiver of an Optical Line Terminal (OLT) is reset at about a time a ranging signal from an ONT is expected to be received. Through the use of the example embodiment, an ONT can be ranged in the presence of a rogue ONT causing the fault condition. Moreover, the example embodiment enables the rogue ONT to be ranged in a presence of the fault condition and an Optical Distribution Network (ODN), which includes the OLT and the rogue ONT, to continue to support communications in a presence of the fault condition.

Method And Apparatus For Detecting And Compensating For Jitter In A Communications Network

View page
US Patent:
20080225898, Sep 18, 2008
Filed:
Jun 12, 2007
Appl. No.:
11/811723
Inventors:
David A. DeLew - Rohnert Park CA, US
Vinita Gupta - Novato CA, US
Robert S. Larvenz - Rohnert Park CA, US
Joseph Golja - Petaluma CA, US
International Classification:
H04J 3/06
H04J 14/08
US Classification:
370503, 398154
Abstract:
Jitter in a clock signal can cause communications faults in communications networks, such as in networks in which downstream nodes use recovered clock signals as timing for upstream communications. An embodiment of the present invention detects and compensates for jitter in a network by recovering a reference clock associated with communications signals between nodes, such as an Optical Line Terminal (OLT) and Optical Network Terminal (ONT) in a Passive Optical Network (PON). A local clock is synchronized with the reference clock. Jitter induced faults may be detected and compensated for by increasing the synchronization rate, then decreasing the synchronization rate until jitter induced faults begin to occur. A loss or change in a rate of communications errors occurring as a function of the synchronization rate may be monitored and reported to a system operator. Compensating for jitter by adjusting the synchronization rate provides for robust communications between network nodes.

Method And Apparatus For Identifying Faults In A Passive Optical Network

View page
US Patent:
20090010643, Jan 8, 2009
Filed:
Jul 6, 2007
Appl. No.:
11/825650
Inventors:
David A. DeLew - Rohnert Park CA, US
Vinita Gupta - Novato CA, US
Bernardus F. Egberts - Petaluma CA, US
Daniel L. Smith - Petaluma CA, US
Paul A. Henderson - Rohnert Park CA, US
Edward J. Sackman - Santa Rosa CA, US
Michael J. Wurst - Santa Rosa CA, US
International Classification:
H04B 10/08
US Classification:
398 17
Abstract:
Component malfunctions in passive optical networks (PON) can increase bit error rates and decrease signal-to-noise ratio in communications signals. These faults may cause the receivers of the signals, either the optical line terminal (OLT) or optical network terminals (ONTs), to experience intermittent faults and/or may result in misinterpreted commands that disrupt other ONT's communication, resulting in a rogue ONT condition. Existing PON protocol detection methods may not detect these types of malfunctions. An embodiment of the present invention identifies faults in a PON by transmitting a test series of data patterns via an optical communications path from a first network node to a second network node. The test series is compared to an expected series of data patterns. An error rate may be calculated as a function of the differences between the test series and expected series. The error rate may be reported to identify faults in the PON.

Method And Apparatus For Reducing Error Rate During Data Transmission In An Optical Communications Network

View page
US Patent:
20090052891, Feb 26, 2009
Filed:
Aug 22, 2007
Appl. No.:
11/843644
Inventors:
David A. DeLew - Rohnert Park CA, US
Vinita Gupta - San Rafael CA, US
Edward J. Sackman - Santa Rosa CA, US
Robert S. Larvenz - Rohnert Park CA, US
Assignee:
Tellabs Petaluma, Inc. - Naperville IL
International Classification:
H04B 17/00
US Classification:
398 26
Abstract:
An apparatus and a method of enhancing data integrity for data transmission over an optical network are disclosed. Upon detecting a low performance condition associated to the optical communications network, an error correcting code (“ECC”) device is activated. The ECC device inserts the ECC to a data stream to form an ECC data stream. Once the ECC data stream reaches to the destination, the ECC device corrects any errors incurred during the transmission, and removes the ECC from the ECC data stream. It should be noted that the ECC device can also be activated by a request from a network operator.
Control profile
David A Delew from San Rafael, CA, age ~60 Get Report