Knowledge Base

PoE FAQ's

Overview of the basic SCSI information needed to identify each command.

Topics of transmission Speeds and Unit Intervals, OOB Construction, and Differential Signaling.

Discussing OOB State Machine, speed negotiation, 8b10B Encoding and Synchronization State Machine.

Presenting Clause 7 with a primitive Overview, Primitive Types and definitions, and open Connection Handshake.

Presenting the topics of Transport Layer Protocols: SSP, SMP and STP.

Overview of the physical Layer Test Suites and Equipment, Protocol test suites and equipment and Interop testing.

Overview of the types of SAS Devices, SAS/SATA Interop, and cables and Connector Types.

SATA uses in the enterprise
SATA uses in personal computing
Device form factors
ODDD, HDD and SSD Devices
Port Multipliers.

SATA uses in the enterprise
SATA uses in personal computing
Device form factors
ODDD, HDD and SSD Devices
Port Multipliers.

SATA uses in the enterprise
SATA uses in personal computing
Device form factors
ODDD, HDD and SSD Devices
Port Multipliers.

Overview on the device command Layer Protocols.

Transport layer overview.

Presenting the topics: 8b10b Encoding, SATA Primitive, ALIGN use in SATA, Hold use, & Cont use.

Overview of the Chapter 8 OOB and Phy Power States.

Overview of the SATA PHY Layer.

Overview on the application layer.

Step by step overview on the PCIe Express.

An overview of various wireless networking technologies, their relationship to one another, and a look at emerging standards.

In the growing world of ubiquitous networking, people often take for granted that interoperability exists between their network devices and the networks they are connecting to. Consortium vendors and international standards bodies are formed to establish standards on how devices should behave if they wish to communicate with each other. However, verifying conformance to these standards is no trivial task. The RSP was developed to add to the Wireless LAN Consortium's testing capabilities. The RSP has the capability of reacting to wireless traffic in a manner that tests a device's handling of uncommon, but very important conditions. The RSP Consists of an 802.11 MAC'less card from Intersil, interfaced to an Altera programmable logic device, which in turn communicates with a PC through a USB microcontroller.

The chaotic nature of the radio frequency medium of 802.11 wireless networks makes it problematic to obtain accurate and precise repetition of performance tests and measurements. Environmental variables that deeply influence link performance must be addressed before throughput testing can be accurately measured across various devices. An RF shielded room with anechoic foam provides the most ideal environment for throughput tests compared to either an RF shielded room without foam or an open air laboratory. Location within the RF shielded room with anechoic foam was shown to have a negligible effect on performance, but using an RF absorbing rubber mat under a device was shown to reduce reflections, producing an optimal environment for throughput testing.

Overview of Quality of Service (QoS) Enhancements for the MAC based on TGe draft 6.0.

This presentation provides an overview of clock and time synchronization across heterogeneous networks using the published standards:
- IEEE Std 802.1AS(TM)-2011 and
- IEEE Std 802.11(TM)-2012 Timing Measurement

With special focus on wireless / 802.11 links

Most network applications today are written to use TCP/IP via sockets. Remote Direct Memory Access (RDMA) is gaining popularity because its zero-copy, kernel-bypass features provide a high throughput, low latency reliable transport. Unlike TCP, which is a stream-oriented protocol, RDMA is a message-oriented protocol, and the OFA verbs library for writing RDMA application programs is more complex than the TCP sockets interface. UNH EXS is one of several libraries designed to give applications more convenient, high-level access to RDMA features. Recent work has shown that RDMA is viable both in the data center and over distance.

One potential bottleneck in libraries that use RDMA is the requirement to wait for message advertisements in order to send large zero-copy messages. By sending messages first to an internal, hidden buffer and copying the message later, latency can be reduced at the expense of higher CPU usage at the receiver. This paper presents a communication algorithm that has been implemented in the UNH EXS stream-oriented mode to allow dynamic switching between sending transfers directly to user memory and sending transfers indirectly via an internal, hidden buffer depending on the state of the sender and receiver. Based on preliminary results, we see that this algorithm performs well under a variety of application requirements.

Epoch & Unix Timestamp Conversion Tools