Category: Metro Ethernet – Mef

Microelectromechanical system oscillator

August 15, 2016 by zafer mehmood95

Filed under Metro Ethernet - Mef

Last modified August 15, 2016

Microelectromechanical system oscillator

Micro-electro-mechanical system (MEMS) oscillators are timing devices that are very stable reference frequencies, which may generate measure time. This reference frequency can be used to sequence electronic systems, manage data transfer Define radio frequencies, and measuring elapsed time. The core technologies used in MEMS oscillators are in development since the mid-1960s, but only sufficiently advanced for defining

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Ubiquiti Networks

August 5, 2016 by zafer mehmood95

Filed under Metro Ethernet - Mef

Last modified August 18, 2016

Ubiquiti Networks

Ubiquiti Networks Ubiquiti Networks is a US technology company started in 2005. Based in San Jose, California Ubiquiti produces wireless data communications products for businesses and wireless broadband providers with a primary focus on underserved and emerging markets. Such brands include Airmax & airFiber for Outdoor Wireless, Unified series managed wired and wireless networking products, as well SunMax Grid-tied

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Intel readies chip to rival NVIDIA for machine learning

June 27, 2016 by zafer mehmood95

Filed under Metro Ethernet - Mef

Last modified June 28, 2016

Intel readies chip to rival NVIDIA for machine learning

Intel readies chip After leaving his own GPU supercomputers, machine learning, and video games in 2009, Intel has returned to the market with a new 72-core Xeon Phi, to compete with the growing portfolio of NVIDIA’s GPUs. The Xeon Phi “Knights Landing” chip, announced at the International Supercomputing Conference in Frankfurt, Germany last week, Intel’s most powerful and expensive chip-to-date

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Carrier wave

June 16, 2016 by zafer mehmood95

Filed under Metro Ethernet - Mef

Last modified June 17, 2016

Carrier wave

In the telecommunications sector, a carrier, carrier signal, or single carrier, is a waveform (generally sinusoidal) which is modulated (adapted) to an input signal for the purpose of information transmission. This carrier wave is usually a much higher frequency than the input signal. The aim of the carrier usually refers to the information through space as electromagnetic waves (such as radio) or to

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Fiber Bragg grating

May 23, 2016 by zafar mahmood

Filed under Metro Ethernet - Mef

Last modified May 23, 2016

Fiber Bragg grating

A fiber Bragg grating (FBG) is a kind of distributed Bragg reflector constructed in a short segment of optical fiber which reflect specific wavelengths of light and transmits all others. This is achieved by a periodic variation in the refractive index of the fiber core, which generates a wavelength-specific dielectric mirror. A fiber Bragg grating can therefore be used as an inline optical filter to block certain wavelengths

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NXDN

May 21, 2016 by zafar mahmood

Filed under Metro Ethernet - Mef

Last modified May 21, 2016

NXDN

IDAS Radio IC-F3162DT NXDN is a common air interface (CAI) technical protocol for mobile communications. It was jointly developed by Icom Incorporated andKenwood Corporation. NXDN performed by Icom in their IDAS system and by Kenwood as Nexedge ;. both Kenwood and Icom now offering dual-standard equipment European dPMR standard supports NXDN applications The NXDN protocol

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PROFINET Device Classification

May 18, 2016 by zafar mahmood

Filed under Metro Ethernet - Mef

Last modified May 18, 2016

PROFINET Device Classification

PROFINET IO devices classifies into three types; IO controller, IO devices and IO supervisors. IO controllers are devices that implement an automation program. Controllers, functionally similar to a Profibus Master Class 1, to exchange data with IO devices. IO devices are distributed sensor / actuator devices connected to the IO controller over Ethernet. In terms Profibus, IO devices are comparable with PROFIBUS slaves

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Analog signal

May 18, 2016 by zafar mahmood

Filed under Metro Ethernet - Mef

Last modified May 18, 2016

Analog signal

An analog signal has a theoretically infinite resolution. In practice, an analogue signal is subject to electronic noise and distortion introduced by communication channel sand signal processing operations, which progressively can degrade the signal-to-noise ratio (SNR). By contrast, digital signals, a finite resolution. Converting an analog signal into digital form, introduces a constant low-level noise referred to as

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Auto negotiation

May 13, 2016 by zafar mahmood

Filed under Metro Ethernet - Mef

Last modified May 16, 2016

Auto negotiation

Auto negotiation is an Ethernet procedure by which two connected devices choose common transmission parameters such as speed, duplex mode, and flow control. In this process, the connected devices first share their capabilities with respect to these parameters and then choose the highest performance transmission mode they both support. In the OSI model, auto negotiation is in the physical layer. Ethernet over twisted pair

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Star LAN

May 7, 2016 by zafar mahmood

Filed under Metro Ethernet - Mef

Last modified May 11, 2016

Star LAN

Star LAN Star LAN was the first IEEE 802.3 standard for Ethernet over twisted pair cabling. It is standardized by the Standards Association of the Institute of Electrical and Electronics Engineers (IEEE) in 1986 as 802.3e, as the 1BASE5 version of Ethernet. Star-LAN The Task Force was chaired by Bob Galin. Description An early version of Star-LAN was developed by Tim Rock and Bill Aranguren

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EPROM

April 29, 2016 by zafar mahmood

Filed under Metro Ethernet - Mef

Last modified April 29, 2016

EPROM

Operation     Details     Application     EPROM Sizes

An EPROM (rarely EROM), or erasable programmable read-only memory, is a type of memory chip that retains its data when the power supply is turned off. Computer memory that can be retrieved stored data after power is turned off and then said nonvolatile. It is a series of floating gate transistorsindividually programmed by an electronic device that delivers higher voltages than usual in digital circuits

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Media independent interface

April 4, 2016 by zafar mahmood

Filed under Metro Ethernet - Mef

Last modified April 11, 2016

Media independent interface

Transmitter signals     Receiver signals     Control signals     Restrictions     Reduced media independent interface     RMII transmitter signals     RMII receiver signals     RMII Control signals     RMII Restrictions     RMII Signal Levels     Gigabit media-independent interface

The media-independent interface (MII), was originally defined as a standard interface to a Fast Ethernet connection (ie., 100 Mbit / s) media access control (MAC) block to a PHY chip. The MII design has been extended to support lower signals and higher speed. The current variations are reduced media independent interface gigabit media-independent interface reduced gigabit media-independent interface serial gigabit media-independent

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