Cisco Technology, Inc.

Stephen S Ong

Lin Shen

Mark Siechen

Maurilio Tazio De Nicolo

Yongming Xiong

Shahbaz Mahmood

Timothy Conrad Lee

Randy J Bleske

Richard Brooks

Liming Yin

Ali Haeri

Qinghua Chen

A method and apparatus for matching the lengths of traces of differential signal pairs. The method includes determining that a first trace is longer than a second trace and modifying the second trace so that the length is substantially equal to the length of the first trace. In some implementations, the second trace can be modified by replacing one or more sections of the trace with two line segments that are substantially equal in length and meet at a vertex that is less than 180 degrees.

Triangular routing for high speed differential pair length matching

Embodiments relate generally to network system and apparatus for heat management of high volume network devices. More specifically, disclosed are system and apparatus that provide for improving heat dissipation of the network devices through improved air circulations, including a PCB with at least one slot and a connector cage mounted on the printed circuit board, the connector cage being within a certain distance from the at least one slot in the PCB.

System and apparatus for network device heat management

A rack mounting kit is configured to allow mounting of a telecommunications equipment chassis into a rack by a single person. The rack mounting kit includes two complimentary brackets that form a shelf-like feature. The complimentary brackets also include a mating latch for interfacing with a chassis to secure the chassis in place. Additionally, a cross brace is provided that is removably installed onto the two complimentary brackets to provide additionally rigidity to a rack while a chassis is being installed. The cross brace can be removed once installation of the chassis is complete.

Rack mounting kit for telecommunications equipment and rack cross brace

A single-motion trigger line card insertion/removal tool uses a handle and a spring-loaded sliding trigger to allow a technician to grab the line card insertion/removal tool with their thumb and pointer fingers, and pull the trigger while rotating the handle to eject the line card from a network device. The motion of pulling the trigger simultaneously unlocks the line card insertion/removal tool, starts the rotation of the handle with the spring load, and closes a 'window' on an optical switch breaking a continuous beam of light that software interprets as a warning that the line card will be removed momentarily. When the line card insertion/removal tool handle is rotated back to a closed position (i.e. while inserting the card), the spring tension pulls the trigger back to its original position, locking the line card insertion/removal tool handle, and opening the window for to the beam of light in the optical switch.

Single-motion trigger ejector with optical switch actuator

Various example embodiments are disclosed. According to one example embodiment, a small form factor pluggable (SFP or SFP+) module may include an equalizer and a logic controller. The equalizer may be configured to receive data, provide signal information to a logic controller based on the received data, equalize the data based on equalization instructions received from the logic controller, and transmit the equalized data. The logic controller may be configured to transmit the signal information received from the equalizer receive programming instructions provide the equalization instructions to the equalizer based on the programming instructions, receive control inputs associated with the data, and provide status outputs based on the control inputs and the programming instructions. The SFP or SFP+ module may be configured to plug into a small form factor (SFF) host connector.

Programmable SFP or SFP+ module

Techniques are disclosed for describing packet headers in a format that can be used by a code generation tool to generate source code that can generate any type of packet header when compiled and invoked within switch/router firmware. Such packet headers may then be used in a variety of switch diagnostic/testing functions. A code generation tool may be configured to receive a description of a packet header in the description format. The packet description language provides an easily used approach for defining fields in a packet header. Further, the code generation tool may be configured to generate packet header library for use by firmware on a network device, e.g., for testing and diagnostic functions.

Auto code generation to generate packet header generation library for switch diagnostics

A media independent interface (MII) is utilized on each processor card of a multi-processor card system in a carrier sense multiple access/collision detection (CSMA/CD) standard bus configuration to provide a data communications bus. This permits standard Media Access Control (MAC) devices to be used with the MII. The collision domain is implemented by having each active processor card using the data communications bus assert an analog signal on a single conductor of the back plane and sense its voltage value to determine if one or more processor cards are currently accessing the bus.

Growing community of inventors

Fremont, CA, United States of America

Stephen S Ong