John G Fijolek

6351773, Feb 26, 2002

Dec 21, 1998

09/217534

John G. Fijolek - Naperville IL
Levent Gun - Lake Forest IL
Ronald B. Lee - Northbrook IL
Philip T. Robinson - Barrington IL

3Com Corporation - Santa Clara CA

G06F 1100

709228, 709222, 370 19

Methods for providing restricted access for a network device such as a cable modem or customer premise equipment on a data-over-cable system. An unknown or new network device is assigned a restricted network address such as a restricted Internet Protocol address. The restricted network address allows the network device to access less than all of the available features on the data-over-cable system. A connection timer is started on the data-over-cable system for a restricted connection to the network device. The connection timer restricts access to the data-over-cable system over a timed interval. A restricted connection is created between the data-over-cable system and the network device including the temporary restricted network address and the connection timer, thereby providing restricted access to the data-over-cable system over a timed interval. The methods may allow a data-over-cable system to provide restricted connections to unknown or new network devices without a long delay, yet provide security to the data-over-cable system.

6510162, Jan 21, 2003

May 27, 1998

09/090593

John G. Fijolek - Naperville IL
Nurettin B. Beser - Evanston IL

3Com Corporation - Santa Clara CA

H04J 316

370432, 370469, 370486, 709223, 709239, 709225

A system and method for managing the data channel usage in a data over cable system having more than one data channel. The system includes network devices, which are cable modems connected in at least a downstream connection to one of the data channels in a cable network. The upstream connection to the cable modem may be to the cable network or to alternative networks such as, the public switched telephone network. During initialization, the cable modems attempt to communicate over a channel designated for it in the configuration parameters provided for the cable modems. If unable to use the channel, or if no channel has yet been defined for it, the cable modem scans the bandwidth for an available data channel. The cable modem may lock on the first found data channel. The cable modems register with the cable network and are assigned to a cluster.

6553568, Apr 22, 2003

Sep 29, 1999

09/407337

John G. Fijolek - Naperville IL
Phillip T. Robinson - Lake Barrington IL
Irene M. Gilbert - Palatine IL
Daniel M. Budinger - Arlington Heights IL
Narij Jain - San Jose CA

3Com Corporation - Santa Clara CA

H04N 7173

725111, 725100, 725 86, 709218

Methods and system for service level agreement enforcement on a data-over-cable system. One or more service level agreements are created including one or more class-of-service or quality-of-service parameters. A pool of Internet Protocol addresses is allocated for the one or more service level agreements. Configuration files including service level agreement parameters are used to initialize cable modems or customer premise equipment. When a cable modem or customer premise equipment requests use of a service level agreement, an Internet Protocol address from the pool of Internet Addresses associated with a desired service level agreement is assigned. The service level agreements are enforced using the Internet Protocol address from a cable modem termination system including an integral switch cable access router and a bandwidth manager. The cable modem termination system with integral components are duplicated to provide a âhot backâ up in case of failure and increase reliability for using service level agreements. The cable access router enforces maximum rate limits for service level agreements.

6560203, May 6, 2003

May 27, 1998

09/085905

Nurettin B. Beser - Evanston IL
John G. Fijolek - Naperville IL

3Com Corporation - Santa Clara CA

H04L 1226

370252, 370352, 370401, 370465, 725111

A method and system for changing type-of-service with an associated quality-of-service in a data-over-cable system is provided. The method and system allow a cable modem or a cable modem termination system to dynamically override the statically assigned type-of-service supplied to the cable modem in a Dynamic Host Configuration Protocol (âDHCPâ) initialization sequence. A selection input can request a second type-of-service that may or may not be supported by the cable modem on the cable modem termination system. If the requested second type-of-service with an associated second quality-of-service is permitted on the cable modem, the cable modem termination system dynamically changes the first type-of-service to the requested second type-of-service. Allowing a cable modem and cable modem termination system to change the statically assigned type-of-service to a second type-of-service allows the user greater flexibility for configuration cable modems in a data-over-cable system.

6574110, Jun 3, 2003

May 31, 2000

09/584928

Dan Budinger - Arlington Heights IL
Irene Gilbert - Palatine IL
John G. Fijolek - Naperville IL

3Com Corporation - Santa Clara CA

H05K 700

361729, 361790, 361801, 361727, 439 74, 439260, 439257

The present invention relates to an improved mounting for stacking modem devices. Each mounting includes stacking feet and stacking slots that permit the mountings to be securely stacked on top of one another. Each mounting is configured to receive a modem device. Each mounting also includes connectors configured to interconnect with corresponding connectors of the modem device. For instance, each mounting and the modem have interconnecting power connections, RJ-45 connections, cable connections, and serial data connections. The modem devices can be slid into place for testing, initialization or installation without disassembling the stack. The present invention also provides configuring the mountings so the multiple modem devices can be connected back to back and communicating without a hybrid fiber/coax network connection.

6577642, Jun 10, 2003

Jan 15, 1999

09/232762

John G. Fijolek - Naperville IL
Nurettin B. Beser - Evanston IL
Philip T. Robinson - Lake Barrington IL
Levent Gun - Lake Forest IL

3Com Corporation - Santa Clara CA

H04J 316

370465

A method and system for virtual network administration with a data-over-cable system. A virtual networking tag and a network address (e. g. , an Internet Protocol address) assigned by a network other than a data-over-cable system is used to provide a virtual network to one or more network devices, such as cable modems via a data-over-cable system. The virtual networking tag may also be used to request a desired service class (e. g. , Class-of-Service, Quality-of-Service, Type-of-Service, Service Level Agreements, etc. ), for a desired end-to-end networking service (e. g. , Voice over Internet Protocol). The virtual networking tag can be mapped to a data-over-cable service class. The data-over-cable service class can be mapped into a transport service class for a transport network. The virtual networking tag is used to provide a desired end-to-end networking service from a network device on a first external network (e. g. , an Ethernet Local Area Network), through the data-over-cable system, through a transport network (e. g.

6636485, Oct 21, 2003

May 14, 1998

09/079323

John G. Fijolek - Naperville IL
Nurettin B. Beser - Evanston IL

3Com Corporation - Santa Clara CA

H04L 1264

370252, 370468, 725105

A method and system for quality-of-service in a data-over-cable system is provided. A cable modem in a data-over-cable system makes a connection request to a cable modem termination system with a requested quality-of-service. The requested quality-of-service includes class-of-service, quality-of-service and other related parameters. The connection request is sent from a cable modem or a cable modem termination system to a Quality-of-Service (âQoSâ) server. The OoS server determines if the cable modem termination system has enough bandwidth to make the connection to the cable modem with the requested quality-of-service. If the cable modem termination system has enough bandwidth, a quality-of-service identifier is to returned to the cable modem termination system. The cable modem termination system uses the quality-of-service identifier to make a connection to the cable modem with the requested QoS to the cable modem. The QoS server reduces the computational burden and complexity of software on the cable modem termination system.

6654387, Nov 25, 2003

May 21, 1999

09/316614

Nurettin B. Beser - Evanston IL
John G. Fijolek - Naperville IL

3Com Corporation - Santa Clara CA

G06F 1516

370485, 709250, 725111

A method and system for network address maintenance in a data-over-cable system. The method includes determining whether a network device, such as a cable modem, registers in a timely manner. When updating network address tables, such as Address Resolution Protocol tables, a time value is associated with an address, such as an Internet Protocol (âIPâ) address, of a network device. If a time between two registration events exceeds this time value, the network address is deleted from the network address table. The deletion of the network address ensures that the device is isolated from the network. The method and system provide for the rapid removal of stale network addresses, freeing valuable memory space, and increasing security in a data-over-cable system.