creating a request for proposal

... was published as ANSI/ TIA/EIA-568 -A, or just TIA/EIA-568 -A In subsequent years, TIA/EIA-568 -A was updated with a series of addendums For example, TIA/EIA-568 -A- 5 covered requirements for enhanced ... Category was a recognized cable in the 568 -A Standard, but was dropped from ANSI/ TIA/EIA-568-B and also does not appear in ANSI/TIA-568-C Category (was included in ANSI/TIA/EIA-568-B for informative ... The average number of nodes on a network segment has decreased dramatically, while the number of applications and the size of the data transferred have increased dramatically Applications are...

Ngày tải lên: 18/02/2014, 21:20

... it can not be used in the planned commercial applications The main advantage is a simple management layer (L2) and the main disadvantage is a complicated physical layer (L1) Multimode Passive ... 27-28 Musa S et al Multimode fiber matched arrayed waveguides grating-based (de-) multiplexer for short distance communications ECOC, 2002 PLC 6.2.1 Nadarajah N., Manik A. , Ampalavanapillai N., ... the laser 62 Optical Fiber Communications and Devices (a) Optical pulse (b) Adiabatic chirp DML -A (c) Transient chirp DML-T Fig Optical pulses shapes (a) and chirp in an adiabatic (b) and transient...

Ngày tải lên: 21/06/2014, 05:20

... where Ii and σi are average values and variances of the “1” and “0” values for each pattern Q factor can be considered just a qualitative indicator of the actual BER and it can expressed as BER ... know fact that a simple glass capillary acts as a waveguide for X-rays because refractive index for X-rays in any medium is less than unity X-rays transmit glass capillary in the regime of total ... image may be equal to some microns in according to formula 17 This is a way for obtaining micro and nano-sized X-ray beams We fabricated and tested some microcapillary refractive X-ray lenses for...

Ngày tải lên: 21/06/2014, 05:20

... overhead cables Optical fibre is dominant in submarine, long haul and metropolitan area networks, and is beginning to dominate high-performance access networks The demand for high-capacity data transmission ... installation to become the de facto local area network standard Ethernet has evolved and adapted to meet the increasing bandwidth demands of end-users The latest variants, 40 and 100 Gigabit ... standardised by the IEEE data transport applications over both copper and optical fibre Other enhancements, such as the support for operations, administration and maintenance (OAM) functionality,...

Ngày tải lên: 21/06/2014, 05:20

... compared to binary formats on one hand, and better performance than modulation formats with richer vocabulary on the other hand Major bottlenecks of this approach are ultra-high sampling rate, ... would probably fail to work according to its main role, coupling the numbers of individual optical signal (Ab-Rahman, Guna et al 2009; Ab-Rahman, Guna et al 2009; Ab-Rahman, Guna et al 2009) The ... Informatics, Selangor, Malaysia Ab-Rahman, M S., H Guna, et al (2009) "Cost-effective 1x12 POF-Based Optical Splitters as an Alternative Optical Transmission Media for Multi-Purpose Application."...

Ngày tải lên: 21/06/2014, 05:20

... air-filled gap experiments, R Nagano at ANSL for discussing the mixture of refractive-index matching material and airfilled gaps experiments, and H Watanabe, Y Yajima, and M Tanaka at TASC for helpful ... insertion and return losses with a mixture of refractive-index matching material and air-filled gaps vary greatly and are unstable An MT connector sample with a 50-μm gap containing a mixture of refractive-index ... in (b) The calculated and measured data for insertion loss varied between 0.0 and 0.6 dB over a wide wavelength range The data for return loss varied greatly and resulted in a worst value of 8.7...

Ngày tải lên: 21/06/2014, 05:20

... architectures, we also proposed an adaptation of an RWA algorithm that accounts for the lack of node flexibility, and aims at achieving performance similar to that obtained with fully flexible node architectures ... network load equal to 100, for various node architectures and TSP assignment policies Erlangs and 14 available wavelengths We assumed that no MIs are allowed and as a result if the wavelength ... is actually available for use by the RWA algorithm in order to end the lightpath in node d If the RWA algorithm cannot find a lightpath, either due to the unavailability of a path and/or wavelength...

Ngày tải lên: 21/06/2014, 05:20

... Monte Carlo simulations to show how one can use a semi-analytical receiver model to accurately calculate the Q factor for systems with arbitrary optical pulse shapes, arbitrary receiver characteristics, ... Redundancy Constraints Redundancy Constraints Designing WAN Topologies under 295 types, and special underlying graphs such as outerplanar, series-parallel, and Halin graphs All these particular cases ... duplication Agrawal, Klein and Ravi (Agrawal et al., 1995) developed an algorithm for the GSP-EC with performance guarantee of log2 (rmax + 1) , where rmax is the highest requirement value More...

Ngày tải lên: 21/06/2014, 05:20

... Singhal et al., 2006; Sreenath et al., 2006; Ul-Mustafa & Kamal, 2006) In these studies, proposals for handling static and dynamic traffic has been made Proposals have focused on mathematical models ... algorithm is enhanced by Grooming proposals for this project When analyzing the average available capacity per wavelength, we found that the wavelengths and have more available capacity when using ... the capacity of available bandwidth in each wavelength, as shown in Figure 16, PredictionTG-QoS on average available capacity remains higher when compared with the other two allocation algorithms...

Ngày tải lên: 21/06/2014, 05:20

... a single data channel at a data rate N times faster When working as deserializer the process is the opposite The deserializer receives a single data chunk and breaks it into N data channels at ... GND Signal GND Signal Signal GND Signal Signal GND GND Signal Fig 12 Good stack layer for and layers As it can be seen, it is always preferred a layer stack where the signal layers are placed between ... optically transmitted This aggregation/disaggregation process is performed by electronic serializer/deserializer devices A serializer receives data information from N inputs at a given data rate and...

Ngày tải lên: 21/06/2014, 05:20

... 145 Mohammad Syuhaimi Ab-Rahman, Hadi Guna, Mohd Hazwan Harun, Latifah Supian and Kasmiran Jumari Chapter Secure Long-Distance Quantum Communication over Optical Fiber Quantum Channels 163 Laszlo ... angular frequency S, and a high-power pump signal at angular frequency P into an optical fiber that acts as a nonlinear medium Usually the performance of parametric amplifiers is analyzed for ... Fagotto1, Felipe R Barbosa3, 3, Iguatemi E Fonseca4 and Edson Moschim3 André L A Costa 1Pontifícia Universidade Católica de Campinas 2Universidade Federal ABC 3Universidade Estadual de Campinas...

Ngày tải lên: 27/06/2014, 01:20

... monochromatic laser pulse Thus, all modulated data have a nonzero spectral width and the different spectral components of the modulated data travel at different speeds In particular, for digital data ... network as well as the quality of propagating data signals Secondly, they can automatically diagnose and repair the network Thirdly, they can allocate resources and redirect traffic To achieve ... systems A novel 150-km multi-point long distance FBG temperature and vibration fiber sensing system is demonstrated based on Raman amplification In addition to a Raman laser at 1395 nm and a laser at...

Ngày tải lên: 10/09/2015, 08:41

... electrical transport mechanisms, taking place in and across the material grains and the surface interactions with the gaseous ambient, mainly at elevated temperatures (250 - 450°C) where the films have ... should have a very large specific area and therefore it is typically prepared as porous thin/thick layer The most employed manufacturing paths are pt making use of powder technologies, at least in ... revised Manuscript Transport and gas sensing properties of In2O3 nanocrystalline thick films: a Hall effect based approach A. Oprea*1, A Gurlo2, N Bârsan1, U Weimar1 Institute of Physical and Theoretical...

Ngày tải lên: 19/03/2014, 16:47

... seen that the curves exhibit a slower variation than in the case of DSF fibers, and that SNR values above 23 dB are easily obtained with channel spacing as small as 25 GHz This indicates that the ... G.694.1 that suggest equally spaced channel grids However, both the mathematical formulation, and the resulting numerical model are completely general, and can be applied to unequally spaced channel ... density, and bit rate per channel, as well as the occupancy of new wavelength bands – has fostered the development of a variety of fibers Each type of fiber requires a specific approach to the balancing...

Ngày tải lên: 08/07/2014, 17:07

... receivers are shown, for the first time, to perform better in a peak optical power limited environment Performance-optimized spectrum-sliced WDM systems have potential use in both local loop and long-distance ... spectra on receiver sensitivity is investigated for both OOK and FSK transmission, assuming the system (de)multiplexer filters to be N’th order Butterworth bandpass Although narrower filters are ... potential use in both local loop and long-distance fiber communication systems which require low-cost WDM equipment for high data rate applications Abstract iii ...

Ngày tải lên: 06/08/2014, 00:20

... self-adaptation capability to acquire the optimal filter gain, resulting in optimal performance in all the signal-to-noise ratio (SNR) regions for constant-amplitude PSK formats The adaptive DA algorithm ... optimal memory length has a better performance than the adaptive DA at low and moderate SNRs A long-haul coherent PDM-QPSK experiment was demonstrated that the adaptive DA algorithm can outperform ... M-QAM formats Its phase error variance is analytically obtained, and is subjected to the effect of constellation penalty Moreover, we compare three adaptive PEs (NLMS, Kalman and the adaptive DA...

Ngày tải lên: 10/09/2015, 15:47

... FL2000 panels accommodate the modular FL2000 6pak plug-ins 6paks are available in all connector styles and can be ordered as needed • ADC's patented removable angled retainers allow easy access for ... hinged also available 3/06 • 102117AE Ordering Information Description Panel Height Rack or Cabinet Mount Panel, black Includes vertical cable management trough 12 fiber capacity 24 fiber capacity ... Bare fusion Heat shrink fusion Mechanical Rotary FibrLok® Raychem Universal (RU) Nortel AFL (3RU) (5RU) (5RU) (5RU) Adapters/Pigtails P Stranded pigtails and adapters R Ribbon pigtails and adapters...

Ngày tải lên: 18/10/2013, 19:15

Ngày tải lên: 20/12/2013, 22:15

... for the data center or network manager­ particularly for — maximizing system performance and uptime ADC’s TrueNet® Fiber plug-and-play solutions for data center applications are designed to address ... reliability and demand design flexibility to easily accommodate frequent adds and changes to equipment Managing the thousands of cables that typically comprise a data center should always be a ... the data center through properly managed and scalable cable density, which encourages proper airflow and reduces overall installation and maintenance costs Data Center Optical Distribution Frame...

Ngày tải lên: 17/01/2014, 12:20

... axial direction of the fiber and are a logarithmic function of endface separation Sources of longitudinal insertion loss include high apex offset, fiber withdrawal in a ferrule, and mechanical ... system can take advantage of microprocessing to perform a non-linear regression and fit the theoretical sinusoidal curve to the data Regression minimizes measurement uncertainty and allows one ... that a better angle would be 150° Connectors that have fine tuning capability, like ADC’s 12 position tunable SC connector, can therefore maximize tuning accuracy A non-linear regression analysis...

Ngày tải lên: 24/01/2014, 11:20