Kenneth M Buckland

US Patent:

6434166, Aug 13, 2002

Filed:

Jul 30, 1999

Appl. No.:

09/364770

Inventors:

Kenneth M. Buckland - Rohnert Park CA
Jan C. Hobbel - Cotati CA
Earl B. Manchester - Rohnert Park CA

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 1266

US Classification:

370468, 370352, 370389, 370396, 370523

Abstract:

A universal DS- channelized format is provided wherein selected states of CAS bits are used to indicate to the transport mechanism when DS- channels are not being used for voice and are available for use for data transport. In addition, the T frame format carries CAS bits only in the first DS- channel, so that robbed bits are disabled and not used to carry ABCD signaling bits, thereby avoiding any risk of data corruption. Still further, a special CAS signaling value not defined as a CAS state, is employed in a frame nibble instead of a frame counter to indicate that the state is in the first DS- slot.

US Patent:

6618374, Sep 9, 2003

Filed:

Jul 30, 1999

Appl. No.:

09/365601

Inventors:

Kenneth M. Buckland - Rohnert Park CA
Barry W. Field - Santa Rosa CA
Earl B. Manchester - Rohnert Park CA

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 1256

US Classification:

370394, 3703951, 370471, 370536

Abstract:

A single ATM traffic stream is carried over a plurality of lower bandwidth media, such as T- or E- interfaces, using inverse multiplexing assisted by a prepended byte at the beginning of each ATM cell, the byte containing a key to permit recovery of the proper order of ATM cells.

US Patent:

6618399, Sep 9, 2003

Filed:

Oct 27, 1999

Appl. No.:

09/428303

Inventors:

Kenneth M. Buckland - Santa Rosa CA
Barry W. Field - Santa Rosa CA

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04J 306

US Classification:

370516, 370505, 370506

Abstract:

A system and method for transporting telephony signals across an ATM network using AAL1 while eliminating the jitter associated with the AAL1 cells. The present invention uses starve/inspect techniques to dynamically buffer the ATM frames such that jitter associated with the cells can be reduced while avoiding unneeded buffering that would cause excessive delay.

US Patent:

6621828, Sep 16, 2003

Filed:

Dec 1, 1999

Appl. No.:

09/452759

Inventors:

Barry W. Field - Windsor CA
Kenneth M. Buckland - Santa Rosa CA
Charles R. Dyer - Rohnert Park CA
Riccardo G. Dorbolo - Petaluma CA
Danny Thom - Santa Rosa CA
Jan C. Hobbel - Cotati CA
Soren B. Pedersen - Petaluma CA
Thomas A. Potter - Petaluma CA

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04J 316

US Classification:

370466, 3703951, 370458, 370376

Abstract:

A switch card for telecommunications node includes a shared memory operable to store traffic channels. A time slot interchanger (TSI) is coupled to a first bus and to the shared memory. The TSI is operable based on predefined switching instructions to access the shared memory to stored traffic channels received from the first bus and to retrieve traffic channels for transmission on the first bus. An asynchronous transfer mode (ATM) switch is operable to switch a traffic cell based on header information in the traffic cell. A traffic converter is operable to convert traffic channels retrieved from the shared memory to traffic cells for processing by a bus fuser and to convert traffic cells to traffic channels for storage in the shared memory. The bus fuser is coupled to the shared memory through the traffic converter, the ATM switch, and a second bus. The bus fuser is operable to receive a traffic cell from each one of the traffic converter, the ATM switch, and the second bus and to route the traffic cell to another one of the traffic converter, the ATM switch, and the second bus.

US Patent:

6628657, Sep 30, 2003

Filed:

Dec 1, 1999

Appl. No.:

09/452746

Inventors:

Earl B. Manchester - Cotati CA
Barry W. Field - Windsor CA
Kenneth M. Buckland - Santa Rosa CA
Riccardo G. Dorbolo - Petaluma CA
Soren B. Pedersen - Petaluma CA
Thomas A. Potter - Petaluma CA

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 1228

US Classification:

3703951, 370347

Abstract:

A bus for a telecommunications node includes a frame repeating at a defined interval and including a defined number of slots. Each slot includes an overhead portion identifying a type of traffic in the slot and a service traffic portion transporting traffic of the type. A first slot in at least one frame transports in the service traffic portion asynchronous traffic and routing information for the asynchronous traffic in the telecommunications node. A second slot in the frame transports synchronous traffic in the service traffic portion and has a location in the frame associated with routing information for the synchronous traffic in the telecommunications node.

US Patent:

6760327, Jul 6, 2004

Filed:

Dec 1, 1999

Appl. No.:

09/452829

Inventors:

Earl B. Manchester - Cotati CA
Barry W. Field - Windsor CA
Kenneth M. Buckland - Santa Rosa CA
Charles R. Dyer - Rohnert CA
Riccardo G. Dorbolo - Petaluma CA
Danny Thom - Santa Rosa CA
Jan C. Hobbel - Cotati CA
Soren B. Pedersen - Petaluma CA
Thomas A. Potter - Petaluma CA

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 1228

US Classification:

370364, 370252, 370438

Abstract:

A rate adjustable backplane includes a set of switch slots configured to receive one or more switch cards forming a switch core and a plurality of line slots each configured to receive a line card. A low speed bus couples the line slots to the set of switch slots. A high speed bus also couples the line slots to the set of switch slots. Each line slot includes a low speed connector coupled to the low speed bus and a high speed connector coupled to the high speed bus. The low speed connector is adapted to receive a mating connector of a line card to establish a low speed communication connection between the line card and the switch core. The high speed connector is adapted to receive a mating connector of the line card to establish a high speed link between the line card and the switch core.

US Patent:

6778529, Aug 17, 2004

Filed:

Dec 1, 1999

Appl. No.:

09/452751

Inventors:

Barry W. Field - Windsor CA
Kenneth M. Buckland - Santa Rosa CA
Riccardo G. Dorbolo - Petaluma CA

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 1264

US Classification:

370353, 3703955

Abstract:

A synchronous switch for a telecommunications node includes a switch interface, a switch controller, and a switch memory. The switch interface is operable to terminate a bus and to receive from the bus a frame having a plurality of time slots. The time slots are each operable to transport a traffic cell. The switch controller is operable to determine a type for each traffic cell received at the switch interface and to determine based on the type for a traffic cell an address for storing the traffic cell in the switch memory. The switch memory is operable to receive the traffic cell from the switch interface and the address for storing the traffic cell from the switch controller and to store the traffic cell at the address.

US Patent:

6822960, Nov 23, 2004

Filed:

Dec 1, 1999

Appl. No.:

09/452830

Inventors:

Earl B. Manchester - Cotati CA
Barry W. Field - Windsor CA
Kenneth M. Buckland - Santa Rosa CA
Riccardo G. Dorbolo - Petaluma CA

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 1296

US Classification:

370394, 3703956, 370413, 370527, 370529

Abstract:

An asynchronous transfer mode (ATM) switch includes a switch memory having a plurality of discrete queues. A queue is dedicated to a connection in which a traffic stream is transmitted in cells and an inverse multiplex ATM (IMA) format. A switch controller is operable to receive a plurality of cells, to identify cells for the connection, to queue cells for the connection in the queue based on order information received with the cells, to reconstitute from the queue the traffic stream, and to switch the traffic stream and the ATM cells.