Patents by Inventor Shamim Shariffudin Pirzada

Shamim Shariffudin Pirzada has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Dial access stack architecture
    Patent number: 7266112
    Abstract: A Dial Access Stack Architecture (DASA) includes a stack of Network Access Servers (NASs) each independently establishing and processing information for communication links on a public telephone network. A primary interconnect couples the stack of network access servers together through a primary network. A routing engine is coupled through the primary interconnect to the stack of network access servers routing packets between the network access servers and an Internet network. A secondary interconnect couples the stack of network access servers together through a secondary network that operates independently of the primary interconnect. The primary or secondary interconnects each allow pairs of the network access servers to communicate with each other in parallel and independently of the routing engine. The DASA provides scalability and resiliency to fault conditions and can easily aggregate and integrate any new access media. Applications such as voice, video and multicasting can be seamlessly added.
    Type: Grant
    Filed: January 23, 2002
    Date of Patent: September 4, 2007
    Assignee: Cisco Technology, Inc
    Inventors: Bassanio Law, Shamim Shariffudin Pirzada, Shaji Ravindra Nathan
  • Dial access stack architecture
    Patent number: 6373838
    Abstract: A Dial Access Stack Architecture (DASA) includes a stack of Network Access Servers (NASs) each independently establishing and processing information for communication links on a public telephone network. A primary interconnect couples the stack of network access servers together through a primary network. A routing engine is coupled through the primary interconnect to the stack of network access servers routing packets between the network access servers and an Internet network. A secondary interconnect couples the stack of network access servers together through a secondary network that operates independently of the primary interconnect. The primary or secondary interconnects each allow pairs of the network access servers to communicate with each other in parallel and independently of the routing engine. The DASA provides scalability and resiliency to fault conditions and can easily aggregate and integrate any new access media. Applications such as voice, video and multicasting can be seamlessly added.
    Type: Grant
    Filed: June 29, 1998
    Date of Patent: April 16, 2002
    Assignee: Cisco Technology, Inc.
    Inventors: Bassanio Law, Shamim Shariffudin Pirzada, Shaji Ravindra Nathan