Cisco Technology, Inc.

Molex Corporation

Cisco Systems Inc.

Glenn E Lee

John T Chapman

David J Tsiang

Charles J Naegeli

Shuyu Zhang

William L Quackenbush

Patrick S King

Taizhong Huang

Lifu Gong

Gongjian Hu

Alejandro Schwartzman

Yi Liao

Eric Youngman

Paul Lafferty

Timothy Finan

Senming Gong

William L Long

Mike Chia Huang

Mike C Huang

Guojiang Hu

Steven A Jacobson

A thermal compensator, for use in connection with arrayed waveguide grating (AWG) modules which are, in turn, utilized in conjunction with wavelength multiplexing and de-multiplexing within optical networks, is disclosed. The thermal compensator comprises a bow-shaped frame member and a central bar member. The bow-shaped frame member is characterized by a higher coefficient of thermal expansion than that of the central bar member such that the bow-shaped frame member can expand and contract at variable rates compared to that of the central bar member under certain temperature conditions. The bow-shaped frame member is adapted to be attached to a movable section of an athermal arrayed waveguide grating (AAWG) module such that the expansion and contraction movements of the bow-shaped member influence the movement of a movable section of the AAWG module in order to maintain the proper focus of the AAWG module across disparate temperature conditions.

Variable dual-directional thermal compensator for arrayed waveguide grating (AWG) modules

A thermal compensator, for use in connection with arrayed waveguide grating (AWG) modules which are, in turn, utilized in conjunction with wavelength multiplexing and de-multiplexing within optical networks, is disclosed. The thermal compensator comprises a bow-shaped frame member, a central bar member, and a screw. The bow-shaped frame member is characterized by a higher or great coefficient of thermal expansion (CTE) than that of the central bar member such that the bow-shaped frame member can expand and elongate at a greater rate than can the central bar member under hot temperature conditions, however, under cold temperature conditions, the rate of contraction of the bow-shaped member is effectively retarded by the slower rate of contraction of the central bar member. The bow-shaped frame member is adapted to be attached to a movable section of an athermal arrayed waveguide grating (AAWG) module such that the expansion and contraction movements of the bow-shaped member influence the movement of a movable section of the athermal arrayed waveguide grating (AAWG) module in order to maintain the proper focus of the athermal arrayed waveguide grating (AAWG) module across disparate temperature conditions within which the athermal arrayed waveguide grating (AAWG) module is designed to operate.

An optical signal transmission apparatus and a method are provided. The apparatus may include a set of optical transmitters, each optical transmitter configured for transmission of light signals at one or more wavelengths of light. The apparatus may include an output port configured for transmission of the light signals through a span of optical fiber. The apparatus may use an input port configured to receive other transmissions of light signals through the span of optical fiber. The apparatus may include a set of light detectors, each light detector configured to detect a time delay or phase characteristic associated with the one or more wavelengths of light. The apparatus may include a processor configured to determine a metric based on the detected time delay or phase characteristic.

Dispersion monitor apparatus

Methods and apparatus are provided for allowing an operating system to automatically configure and operate multiple types of the same component. According to various embodiments, characteristic information associated with a particular component, such as a tuner, can be written to a nonvolatile memory. An operating system can be configured to read characteristic information from the nonvolatile memory associated with the component. In one example, the characteristic information includes power characteristics associated with the component. By providing characteristic information in a nonvolatile memory, a single version of an operating system can configure and operate many different versions and types of the same component.

Methods and apparatus for allowing component interchangeability

A system and method are disclosed for transmitting upstream data from a cable modem within a cable television plant. One aspect of the invention pertains to a method that includes transmitting a first portion of the upstream data on a first upstream channel from the cable modem and transmitting a second portion of the upstream data on a second upstream channel from the cable modem. The second upstream channel differs from the first upstream channel. In another aspect, the invention pertains to a cable modem that includes a processor configured to initiate transmission on multiple upstream channels. The cable modem further includes an upstream transmitting component operating in conjunction with the processor and configurable by the processor to transmit data over multiple upstream channels. In one embodiment, the upstream transmitting component includes a first transmitter that is capable of being configured by the processor to transmit data at both a first upstream channel and a second transmitter that is capable of being configured by the processor to transmit at a second upstream channel that differs from the first upstream channel.

Data transmission over multiple upstream channels within a cable modem system

A configuration editor receives requests to access a configuration area for a cable modem. Each configuration area corresponds to a particular user type. The configuration editor can then retrieve configuration data corresponding to the configuration area for the particular user type. An area editor selects data fields corresponding to configuration data, and allocates the data fields to one or more configuration areas corresponding to particular user types.

Secure multi-user cable modem configuration editor and viewer

A method and apparatus for reliable interrupt reception over a buffered bus utilizes a mailbox register to receive interrupt request information sent after a data write transaction. The data is sent from an initiating peripheral device over the buffered bus to arrive with an arbitrary delay at the host memory. After completing the sending phase for the data the initiating peripheral device sends a mailbox register data block containing an interrupt request to a mailbox register associated with the host processor. Because the mailbox register data block will necessarily arrive after the receipt of the actual data in the host memory because it is following the actual data through the same buffered bus, the interrupt will be properly sequenced with the receipt of data.

Reliable interrupt reception over buffered bus

A method and apparatus for reliable interrupt reception over a buffered bus utilizes a non-delayed non-posted write transaction to write data over the bus from a peripheral device to host memory. Because there is no buffering delay in a non-delayed non-posted write transaction, at the completion of the write cycle the peripheral knows that the write transaction is complete and then sends an interrupt request to the host processor requesting the host processor to service the interrupt and process the contents of the host memory.

A pluggable port adapter is used for connecting PCI devices to a host system through a PCI local bus while also adding functionality to the host system. The port adapter communicates with the host system through a port adapter/host interface that includes the PCI local bus and an auxiliary bus. The auxiliary bus is used for controlling the additional circuitry on the port adapter. A PROM on the adapter card is used for identifying the port adapter type, serial number and hardware revision. The auxiliary bus is used for conducting JTAG testing and is used by the host system to program logic devices on the port adapter. The logic devices can be reprogrammed in the field by the host system to repair bugs and to enhance performance and/or functionality. A power control circuit on the port adapter is controlled by the auxiliary bus for conducting hot swap operations.

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Fremont, CA, United States of America

Glenn E Lee