- Subscribe to this page:
- RSS
- Email Alert
telecommunications
(231 results)Search the Library
Mission Statement
TechRepublic's ITPapers is the Web's largest library of free technical IT white papers, webcasts, and case studies. Covering IT categories including Data Management, IT Management, Networking, Communications, Enterprise Applications, Storage, Security and much more, TechRepublic's White Paper Directory is the best source for technical white papers and IT information.
-
Product Specs
The Avaya Desktop Video Device With the Avaya Flare Experience
Sep 2010
Communications and collaboration are a major challenge in today's enterprise, largely because the devices and user interfaces provided to today's enterprise workers are not up to the job:...
Provided by Avaya
-
Product Specs
Avaya One-X Deskphone 9650 IP Telephone
May 2009
The Avaya one-X Deskphone solution family features an intuitive user interface which helps to make users proficient and confident in performing common telephone tasks such as setting up a...
Provided by Avaya
-
Product Specs
2400 Series Digital Telephones
Nov 2007
Avaya 2400 series digital telephones deliver advanced productivity-boosting features, including a large display, key labeling and a 100-entry call log. They are designed for both general business...
Provided by Avaya
-
Product Specs
Ethernet Routing Switch 4500 Series
Mar 2010
The Avaya Ethernet Routing Switch 4500 Series is a Stackable system providing highperformance, convergence-ready, secure and resilient Ethernet switching connectivity. Available as a range of 11...
Provided by Avaya
-
Product Specs
5600 Series IP Telephones
Nov 2007
Avaya 5600 series IP telephones are designed for organizations using IP Office that want a cost effective way to enjoy the benefits of converged communications. These H.323 IP telephones connect...
Provided by Avaya
-
Product Specs
Avaya G430 Media Gateway
Jan 2010
The Avaya G430 Media Gateway provides a cost effective, scalable and secure platform for delivery of Avaya Communication Manager-based IP telephony applications. It is targeted to small to midsize...
Provided by Avaya
-
Product Specs
Avaya G450 Media Gateway
Jan 2010
The Avaya G450 Media Gateway provides a secure, reliable, and scalable platform for the delivery of Avaya Communication Manager-based IP telephony applications. It is targeted to mid to large...
Provided by Avaya
-
Product Specs
Avaya One-X Deskphone 9620/9620L/9620C IP Telephone
May 2009
The Avaya one-X Deskphone family features an intuitive user interface which helps to make users proficient and confident in performing common telephone tasks such as setting up a conference call...
Provided by Avaya
-
Product Specs
Avaya One-X Deskphone 9640/9640G IP Telephone
May 2009
The Avaya one-X Deskphone solution family features an intuitive user interface which helps to make users proficient and confident in performing common telephone tasks such as setting up a...
Provided by Avaya
-
Product Specs
Avaya One-X Deskphone Value Edition
Jan 2009
Avaya one-X is a portfolio of communications solutions that deliver a powerful and consistent communications experience for the end user - across a variety of devices and interfaces. Avaya one-X...
Provided by Avaya
-
Product Specs
Avaya One-X Deskphone 9670G: One-Touch Access to Contacts, Information, and Applications
Apr 2009
The new Avaya one-X 9670G Deskphone is designed for the "Essential" user: someone who is constantly on the phone, handling multiple calls and is often mobile. The latest addition to the Avaya...
Provided by Avaya
-
Product Specs
Avaya 1692 IP Speakerphone: A High-Quality, IP-Enabled Speakerphone for Conference Rooms
Jul 2010
The Avaya 1692 IP Speakerphone provides the convenience and productivity benefits inherent in a powerful, hands-free conference phone. It delivers the extensive set of Avaya Aura features directly...
Provided by Avaya
-
Product Specs
Avaya Proactive Outreach for Financial Services
Feb 2009
Increased competition and economic instability are among the many factors that make attracting new customers and retaining existing ones an ongoing challenge for financial services organizations....
Provided by Avaya
-
Webcasts
Are You Ready for Consumer-Powered IT?
Jan 2010
If one is seeking insight on how to better address the employee productivity and support their increased mobility and device support, this webinar is for them. Listen to hear what devices...
Provided by Unisys
-
Whitepapers
Impact and Handling of Demand Uncertainty in Multiperiod Planned Networks
Apr 2011
For long-term operated networks, pre-planning is a challenging task due to uncertainty in future demand requests. In this paper, the authors first address the question of how severe the impact of...
Provided by Institute of Electrical & Electronic Engineers
-
White Papers
An Innovative Pricing Method for Telecommunication Services Pricing Through American Options
Feb 2009
With the evolution of telecommunication networks and of their services the role of service provider is changed, so nowadays there is a coexistence of Network Operators and Virtual Operators. The...
Provided by Academy Publisher
-
White Papers
An Algorithm for NGN Feature Interaction Dectection
Dec 2009
With service design open to third-party in the evolving telecom networks, dynamic method is suitable for Feature Interaction (FI) detection. When implementing this method, however, the violation...
Provided by Academy Publisher
-
White Papers
Rate Allocation for Satellite Systems With Correlated Channels Based on a Stackelberg Game
Aug 2009
In this paper, the authors consider the problem of capacity allocation for fixed broadband (Ka band) satellite networks with a large coverage and correlated atmospheric channel conditions both in...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
An EM Based Frequency Domain Channel Estimation Algorithm for Multi-Access OFDM Systems
Oct 2009
Channel estimation is an important prerequisite for receiver design. In this paper the authors present a semi-blind low complexity frequency domain based channel estimation algorithm for...
Provided by King Fahd University of Petroleum & Minerals
-
White Papers
A Time and Mutable Attribute-Based Access Control Model
Jun 2008
Access control is one of the most important technologies to guarantee computer security. A new model with support for valid time and usage constraint is described based on full analysis of flaws...
Provided by Tsinghua University
-
White Papers
Delay/Disruption-Tolerant Network Testing Using a LEO Satellite
May 2008
Delay/Disruption Tolerant Networking (DTN) "Bundles" have been proposed for deep-space communication in the "Interplanetary Internet." This paper describes the first DTN bundle protocol testing...
Provided by NASA
-
White Papers
A Smart Sensor Web for Ocean Observation: Integrated Acoustics, Satellite Networking, and Predictive Modeling
May 2008
In many areas of Earth science, including climate change research, there is a need for near real-time integration of data from heterogeneous and spatially distributed sensors, in particular...
Provided by University of Washington
-
White Papers
Usage Control: A Vision for Next Generation Access Control
Jan 2011
The term Usage Control (UCON) is a generalization of access control to cover obligations, conditions, continuity (Ongoing controls) and mutability. Traditionally, access control has dealt only...
Provided by George Mason University
-
White Papers
A Meeting Detector and Its Applications
Jan 2011
In this paper the authors present a context-sensing component that recognizes meetings in a typical office environment. The prototype detects the meeting start and end by combining outputs from...
Provided by Dartmouth College
-
Whitepapers
Performance Study of a Deep Space Communications System With Low-Density Parity-Check Coding Under Solar Scintillation
Feb 2012
The communication link is the only way for space probe to receive tele-command data from and return telemetry information to the control center on the earth. The design of deep space communication...
Provided by NORTH ATLANTIC UNIVERSITY UNION
-
White Papers
Criticality Aware Access Control Model for Pervasive Applications
Jan 2011
Access control policies define the rules for accessing system resources. Traditionally, these are designed to take a reactive view for providing access, based on explicit user request. This...
Provided by Arizona State University
-
White Papers
Communication in a Poisson Field of Interferers - Part II: Channel Capacity and Interference Spectrum
Jan 2010
In their previous paper, the authors presented a mathematical model for communication subject to both network interference and noise, where the interferers are scattered according to a spatial...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Spectrum Management for Cognitive Radio Based on Genetics Algorithm
Jan 2011
Spectrum scarceness is one of the major challenges that the present world is facing. The efficient use of existing licensed spectrum is becoming most critical as growing demand of the radio...
Provided by Gyan Vihar Universe
-
White Papers
Spectrum Sensing Based on Blindly Learned Signal Feature
Feb 2011
Spectrum sensing is the major challenge in the Cognitive Radio (CR). The authors propose to learn local feature and use it as the prior knowledge to improve the detection performance. They define...
Provided by Tennessee Technological University
-
White Papers
GLRT-Based Spectrum Sensing With Blindly Learned Feature Under Rank-1 Assumption
Mar 2011
Prior knowledge can improve the performance of spectrum sensing. Instead of using universal features as prior knowledge, the authors propose to blindly learn the localized feature at the secondary...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Algebraic Hybrid Satellite-Terrestrial Space-Time Codes for Digital Broadcasting in SFN
Mar 2011
Lately, different methods for broadcasting future digital TV in a Single Frequency Network (SFN) have been under an intensive study. To improve the transmission to also cover suburban and rural...
Provided by University of Turku
-
White Papers
Evolutionary Game and Learning for Dynamic Spectrum Access
Mar 2011
Efficient dynamic spectrum access mechanism is crucial for improving the spectrum utilization. In this paper, the authors consider the dynamic spectrum access mechanism design with both complete...
Provided by Chinese University of Hong Kong
-
White Papers
Channel Estimation and Multiuser Detection in Asynchronous Satellite Communications
Nov 2010
In this paper, the authors propose a new method of channel estimation for asynchronous additive white Gaussian noise channels in satellite communications. This method is based on signals...
Provided by University of Carthage
-
White Papers
Application of DAC Codeword Spectrum: Expansion Factor
Oct 2010
Distributed Arithmetic Coding (DAC) proves to be an effective implementation of Slepian-Wolf Coding (SWC), especially for short data blocks. To study the property of DAC codewords, the author has...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Application of a Design Space Exploration Tool to Enhance Interleaver Generation
Jun 2007
This paper presents a methodology to efficiently explore the design space of communication adapters. In most Digital Signal Processing (DSP) applications, the overall performance of the system is...
Provided by STMicroelectronics
-
White Papers
Achievable Outage Rates With Improved Decoding of Bicm Multiband OFDMA Under Channel Estimation Errors
Aug 2007
The authors consider the decoding of Bit Interleaved Coded Modulation (BICM) applied to multiband OFDM for practical scenarios where only a noisy (possibly very bad) estimate of the channel is...
Provided by CNRS
-
White Papers
The Internet Ecosystem - The Potential for Discrimination
Mar 2010
The Federal Communication Commission is considering rules enforcing "Network neutrality" and legislation proposing similar goals have been discussed in Congress. The goals of the proposed...
Provided by University of Colorado
-
White Papers
Reliability and Cost Reduction of Solar Arrays for GEO Satellites
Sep 2008
Power delivery over the mission life is critical to all satellites; therefore solar arrays must be reliable and live up to predicted on-orbit performance. Space satellite insurance claims were...
Provided by Auburn University
-
White Papers
Effects of Access-Control Policy Conflict-Resolution Methods on Policy-Authoring Usability
Mar 2009
Access-control policies can be stated more succinctly if they support both rules that grant access and rules that deny access, but this introduces the possibility that multiple rules will give...
Provided by Carnegie Mellon University
-
White Papers
A User Study of Policy Creation in a Flexible Access-Control System
Apr 2008
Significant effort has been invested in developing expressive and flexible access-control languages and systems. However, little has been done to evaluate these systems in practical situations...
Provided by Association for Computing Machinery
-
Whitepapers
On the Performance Evaluation of Quasi-Cyclic LDPC Codes With Arbitrary Puncturing
Mar 2010
A novel algorithm, named Improved Protograph-based EXtrinsic Information Transfer (IP-EXIT), is proposed in this paper. With the proposed algorithm, quite accurate performance evaluations of...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Reference Phasor Based Log-Likelihood Ratios for Pilot-Symbol-Assisted BPSK Transmission of LDPC Codes Over the Noncoherent Channel
Mar 2010
The authors derive the log-likelihood ratio for iterative decoding of low-density parity-check codes transmitted using Binary Phase-Shift-Keying (BPSK) with pilot-symbol-assisted modulation. This...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Differential Encoding for Quadrature-Amplitude Modulation
Mar 2010
In this paper, the authors propose a novel differential encoder for QAM (Quadrature-Amplitude Modulation), by a look-up table instead of a rule. Using a table for differential encoding has the...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Selective-Update Decoding of Non-Binary LDPC Codes
Mar 2010
Non-binary LDPC codes are promising error correcting techniques with very good performance, especially for high order fields. Using higher order fields enhances performance but, at the same time,...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Power Efficient Partial Repeated Cooperation Scheme With Regular LDPC Code
Mar 2010
The partially repeated cooperation system employing Low Density Parity-Check (LDPC) codes achieves space diversity and extra coding gain at the same time. This paper focuses on the power...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Half-Duplex Relaying With Serially-Concatenated Low-Density Generator Matrix (SCLDGM) Codes
Mar 2010
Recently, the integration of cooperation with coding has proven to be a very useful technique to enhance relay system performance. Relay systems based on Low-Density Parity Check (LDPC) codes have...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
A Wideband Space Time Statistical Model for Characterization of Satellite Communication Channel in Dense Multipath Environment
Mar 2010
This paper proposes a space-time statistical geometric model for characterization of multipath propagation of the satellite communication, which provides some insight into the spatial properties...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Two-Step Construction Method of Protograph-Based AR4JA Codes in Deep Space Communication
Aug 2012
This paper discusses the construction of the Accumulate-Repeat-4-Jagged-Accumulate(AR4JA) codes which is suitable for the deep-space communication based on the protograph. Two-step construction...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Performance Evaluation and Analysis of Bundle Protocol in Cislunar Communications
Aug 2012
The Bundle Protocol (BP) is developed to solve the new problems in deep space exploration. To date, little work has been done in evaluating the performance of BP applied to an interplanetary...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
The Perceptual Objective Listening Quality Assessment Algorithm in Telecommunication
Aug 2012
In order to accomplish speech quality evaluation tasks in an efficient and economical way, objective computational models which simulate human hearing characteristics of speech perception have...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Distributed Joint Source and Channel Code With Correlated Information Sources
Aug 2012
In this paper, a new Distributed Joint Source-Channel Code (DJSCC) is proposed for a communication network with multiple correlated information sources. The DJSCC is performed by puncturing the...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
HDL Implementation of Low Density Parity Check (LDPC) Decoder
Aug 2012
Low-Density Parity-Check (LDPC) codes are one of the most promising error-correcting codes approaching Shannon capacity and have been adopted in many applications. These codes offer huge...
Provided by International Journal of Electronics and Computer Science Engineering
-
Whitepapers
Countermeasure for Round Trip Delay Which Occurs in Between Satellite and Ground With Software Network Accelerator
Jun 2012
Countermeasure for round trip delay which occurs in between satellite and ground with network accelerator is investigated together with operating system dependency on effectiveness of accelerator....
Provided by The Schwa
-
Whitepapers
2D Satellite Image Registration Using Transform Based and Correlation Based Methods
Jun 2012
Image registration is the process of geometrically aligning one image to another image of the same scene taken from different viewpoints or by different sensors. It is a fundamental image...
Provided by The Schwa
-
Whitepapers
Monte Carlo Based Non-Linear Mixture Model of Earth Observation Satellite Imagery Pixel Data
Aug 2012
Monte Carlo based non-linear mixel (mixed pixel) model of visible to near infrared radiometer of earth observation satellite imagery is proposed. Through comparative studies with actual real earth...
Provided by The Schwa
-
Whitepapers
Genetic Diversity and Population Structure: Implications for Conservation of Wild Soybean (Glycine Soja Sieb. et Zucc) Based on Nuclear and Chloroplast Microsatellite Variation
Oct 2012
Wild soybean (Glycine soja Sieb. et Zucc) is the most important germplasm resource for soybean breeding, and is currently subject to habitat loss, fragmentation and population decline. In order to...
Provided by Chinese Academy of Sciences
-
Whitepapers
Exploiting Polarization for Spectrum Sensing in Cognitive SatComs
Jun 2012
Exploring new techniques for Spectrum Sensing (SS), which can detect the weak primary signals instantly, has been an important research challenge. In this paper, the problem of enhancing SS...
Provided by ICST
-
Whitepapers
The Handover in the Constellations of Satellites in Low Orbit
Apr 2012
The Handover is one of the key subjects in maintaining the quality of service offered by non-geostationary constellation systems. As the satellite coverage moves according to the satellite motion,...
Provided by Science and Development Network (SciDev.Net)
-
Whitepapers
Operating LDPC Codes With Zero Shaping Gap
Sep 2011
Unequal transition probabilities between input and output symbols, input power constraints, or input symbols of unequal durations can lead to non-uniform capacity achieving input distributions for...
Provided by RWSoftware
-
Whitepapers
A Case Study on Satellite Image Fusion Techniques
Jun 2012
Many image fusion algorithms and software tools have been developed for combining images of different spectral and spatial resolution. The resultant color image is of high resolution and is used...
Provided by Maxwell Science Publication
-
Whitepapers
Capacity of General Discrete Noiseless Channels
Jun 2010
This paper concerns the capacity of the discrete noiseless channel introduced by Shannon. A sufficient condition is given for the capacity to be well-defined. For a general discrete noiseless...
Provided by RWSoftware
-
Whitepapers
Online Tracking: Questioning the Power of Informed Consent
Aug 2012
The paper aims to report the main findings of a paper for the Dutch Regulatory authority for the telecommunications sector OPTA to explore how the new European ''Cookie rules'' in the e-privacy...
Provided by University of Almeria
-
Whitepapers
Performance Study of a Deep Space Communications System With Low-Density Parity-Check Coding Under Solar Scintillation
Feb 2012
The communication link is the only way for space probe to receive tele-command data from and return telemetry information to the control center on the earth. The design of deep space communication...
Provided by NORTH ATLANTIC UNIVERSITY UNION
-
Whitepapers
Impact and Handling of Demand Uncertainty in Multiperiod Planned Networks
Apr 2011
For long-term operated networks, pre-planning is a challenging task due to uncertainty in future demand requests. In this paper, the authors first address the question of how severe the impact of...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
On Monte Carlo Simulation of the Bit Error Rate
Apr 2011
Simulation, point estimation, and interval estimation of the bit error rate are rigorously examined. Exact confidence intervals based on the F-distribution approximation for the binomial and...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Evaluation of the Concatenation of LDPC and RS Codes in Magnetic Recording Channel Using Field Programmable Gate Arrays
Oct 2008
Concatenations of inner Low-Density Parity-Check (LDPC) codes and outer Reed-Solomon (RS) codes were evaluated in magnetic recording channel models by simulations using Field Programmable Gate...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Lowering LDPC Error Floors by Postprocessing
Oct 2008
A class of combinatorial structures, called absorbing sets, strongly influences the performance of Low-Density Parity Check (LDPC) decoders at low error rates. Past experiments have shown that a...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Media Defect Recovery Using Full-Response Reequalization in Magnetic Recording Channels
Oct 2008
Conventional method for media defect recovery in a Low-Density Parity-Check (LDPC) coded magnetic recording channel is erasure decoding. In erasure decoding, read back signal in media defect...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Attributes Definitions and Measurement Methods for MADM Based Sink Selection Controls in Satellite Sensor Networks
Oct 2008
The framework of the work is an Environmental Monitoring System (EMS) realized by a Satellite based Sensor Network (SSN). The paper introduces and formalizes specific performance metrics needed to...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Packet Scheduling Over DVB-S2 Through GSE Encapsulation
Oct 2008
Satellite digital video broadcasting is deeply changing : the next generation is dedicated to packet based communications and introduces fade mitigation techniques leading to variable throughput....
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
A DTN routing scheme for quasi-deterministic networks with application to LEO satellites topology
Jul 2012
The authors propose a novel DTN routing algorithm, called DQN, specifically designed for quasi-deterministic networks with an application to satellite constellations. They describe that their...
Provided by Université de Toulouse
-
Whitepapers
A New K-mean Color Image Segmentation With Cosine Distance for Satellite Images
Jun 2012
This paper represents unsupervised method of k-means segmentation which is new adaptive technique of color-texture segmentation. With the progress in satellite images, the image segmentation...
Provided by International Journal of Engineering and Advanced Technology (IJEAT)
-
Whitepapers
The Outage Probability of the Satellite Telecommunication System in the Presence of Fading With Switch and Stay Combining on Satellite and Earth Station
Sep 2011
In this paper, the satellite communication system consisting of the earth transmitting station and the satellite transponder was considered. Switch and Stay Combining (SSC) diversity technics are...
Provided by IARIA
-
Whitepapers
Analytical Evaluation of the Role of Estimation and Quantization Errors in Downstream Vectored VDSL Systems
Sep 2011
The authors investigate the effect of non idealities in the diagonalizing precoder vectoring technique used for cancellation of the far-end crosstalk in downstream VDSL networks. By using...
Provided by IARIA
-
Whitepapers
A Simplified Simultaneous X/Ka-Band Feed-system Design
Sep 2008
A variation on an existing antenna feed system for use on simultaneous X/Ka-band satellite ground terminals is presented. The modified design retains the important functionality of the existing...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Rate Adaptive Binary Erasure Quantization With Dual Fountain Codes
Oct 2008
In this contribution, duals of fountain codes are introduced and their use for lossy source compression is investigated. It is shown both theoretically and experimentally that the source coding...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Clustering of Cycles and Construction of LDPC Codes
Oct 2008
The clustering of cycles to form stopping sets are first observed by T. Tian and et al. As the determination of stopping sets of minimum size is NP-hard, the authors propose to consider clustering...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
A Class of Quantum LDPC Codes Constructed From Finite Geometries
Oct 2008
Low-Density Parity Check (LDPC) codes are a significant class of classical codes with many applications. Several good LDPC codes have been constructed using random, algebraic, and finite...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Fast Identification of Error-Prone Patterns for LDPC Codes Under Message Passing Decoding
Oct 2008
Although density evolution accurately predicts the asymptotic performance of LDPC codes, it provides limited information for codes of short or moderate block length. For this reason, combinatorial...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Noise Thresholds for Discrete LDPC Decoding Mappings
Oct 2008
For decoding Low-Density Parity-Check (LDPC) codes on discrete memoryless channels, a method to quantize messages and to find message-passing decoding functions for the variable and check nodes is...
Provided by Institute of Electrical & Electronic Engineers
-
Product Specs
Avaya One-X Deskphone 9650 IP Telephone
May 2009
The Avaya one-X Deskphone solution family features an intuitive user interface which helps to make users proficient and confident in performing common telephone tasks such as setting up a...
Provided by Avaya
-
Product Specs
2400 Series Digital Telephones
Nov 2007
Avaya 2400 series digital telephones deliver advanced productivity-boosting features, including a large display, key labeling and a 100-entry call log. They are designed for both general business...
Provided by Avaya
-
Product Specs
Ethernet Routing Switch 4500 Series
Mar 2010
The Avaya Ethernet Routing Switch 4500 Series is a Stackable system providing highperformance, convergence-ready, secure and resilient Ethernet switching connectivity. Available as a range of 11...
Provided by Avaya
-
Product Specs
5600 Series IP Telephones
Nov 2007
Avaya 5600 series IP telephones are designed for organizations using IP Office that want a cost effective way to enjoy the benefits of converged communications. These H.323 IP telephones connect...
Provided by Avaya
-
Product Specs
Avaya G430 Media Gateway
Jan 2010
The Avaya G430 Media Gateway provides a cost effective, scalable and secure platform for delivery of Avaya Communication Manager-based IP telephony applications. It is targeted to small to midsize...
Provided by Avaya
-
Product Specs
Avaya G450 Media Gateway
Jan 2010
The Avaya G450 Media Gateway provides a secure, reliable, and scalable platform for the delivery of Avaya Communication Manager-based IP telephony applications. It is targeted to mid to large...
Provided by Avaya
-
Product Specs
Avaya One-X Deskphone 9620/9620L/9620C IP Telephone
May 2009
The Avaya one-X Deskphone family features an intuitive user interface which helps to make users proficient and confident in performing common telephone tasks such as setting up a conference call...
Provided by Avaya
-
Product Specs
Avaya One-X Deskphone 9640/9640G IP Telephone
May 2009
The Avaya one-X Deskphone solution family features an intuitive user interface which helps to make users proficient and confident in performing common telephone tasks such as setting up a...
Provided by Avaya
-
Product Specs
Avaya One-X Deskphone Value Edition
Jan 2009
Avaya one-X is a portfolio of communications solutions that deliver a powerful and consistent communications experience for the end user - across a variety of devices and interfaces. Avaya one-X...
Provided by Avaya
-
Product Specs
Avaya One-X Deskphone 9670G: One-Touch Access to Contacts, Information, and Applications
Apr 2009
The new Avaya one-X 9670G Deskphone is designed for the "Essential" user: someone who is constantly on the phone, handling multiple calls and is often mobile. The latest addition to the Avaya...
Provided by Avaya
-
Product Specs
Avaya 1692 IP Speakerphone: A High-Quality, IP-Enabled Speakerphone for Conference Rooms
Jul 2010
The Avaya 1692 IP Speakerphone provides the convenience and productivity benefits inherent in a powerful, hands-free conference phone. It delivers the extensive set of Avaya Aura features directly...
Provided by Avaya
-
Product Specs
Avaya Proactive Outreach for Financial Services
Feb 2009
Increased competition and economic instability are among the many factors that make attracting new customers and retaining existing ones an ongoing challenge for financial services organizations....
Provided by Avaya
-
Webcasts
Are You Ready for Consumer-Powered IT?
Jan 2010
If one is seeking insight on how to better address the employee productivity and support their increased mobility and device support, this webinar is for them. Listen to hear what devices...
Provided by Unisys
-
Whitepapers
Impact and Handling of Demand Uncertainty in Multiperiod Planned Networks
Apr 2011
For long-term operated networks, pre-planning is a challenging task due to uncertainty in future demand requests. In this paper, the authors first address the question of how severe the impact of...
Provided by Institute of Electrical & Electronic Engineers
-
White Papers
An Innovative Pricing Method for Telecommunication Services Pricing Through American Options
Feb 2009
With the evolution of telecommunication networks and of their services the role of service provider is changed, so nowadays there is a coexistence of Network Operators and Virtual Operators. The...
Provided by Academy Publisher
-
White Papers
An Algorithm for NGN Feature Interaction Dectection
Dec 2009
With service design open to third-party in the evolving telecom networks, dynamic method is suitable for Feature Interaction (FI) detection. When implementing this method, however, the violation...
Provided by Academy Publisher
-
White Papers
Rate Allocation for Satellite Systems With Correlated Channels Based on a Stackelberg Game
Aug 2009
In this paper, the authors consider the problem of capacity allocation for fixed broadband (Ka band) satellite networks with a large coverage and correlated atmospheric channel conditions both in...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
An EM Based Frequency Domain Channel Estimation Algorithm for Multi-Access OFDM Systems
Oct 2009
Channel estimation is an important prerequisite for receiver design. In this paper the authors present a semi-blind low complexity frequency domain based channel estimation algorithm for...
Provided by King Fahd University of Petroleum & Minerals
-
White Papers
A Time and Mutable Attribute-Based Access Control Model
Jun 2008
Access control is one of the most important technologies to guarantee computer security. A new model with support for valid time and usage constraint is described based on full analysis of flaws...
Provided by Tsinghua University
-
White Papers
Delay/Disruption-Tolerant Network Testing Using a LEO Satellite
May 2008
Delay/Disruption Tolerant Networking (DTN) "Bundles" have been proposed for deep-space communication in the "Interplanetary Internet." This paper describes the first DTN bundle protocol testing...
Provided by NASA
-
White Papers
A Smart Sensor Web for Ocean Observation: Integrated Acoustics, Satellite Networking, and Predictive Modeling
May 2008
In many areas of Earth science, including climate change research, there is a need for near real-time integration of data from heterogeneous and spatially distributed sensors, in particular...
Provided by University of Washington
-
White Papers
Usage Control: A Vision for Next Generation Access Control
Jan 2011
The term Usage Control (UCON) is a generalization of access control to cover obligations, conditions, continuity (Ongoing controls) and mutability. Traditionally, access control has dealt only...
Provided by George Mason University
-
White Papers
A Meeting Detector and Its Applications
Jan 2011
In this paper the authors present a context-sensing component that recognizes meetings in a typical office environment. The prototype detects the meeting start and end by combining outputs from...
Provided by Dartmouth College
-
Whitepapers
Performance Study of a Deep Space Communications System With Low-Density Parity-Check Coding Under Solar Scintillation
Feb 2012
The communication link is the only way for space probe to receive tele-command data from and return telemetry information to the control center on the earth. The design of deep space communication...
Provided by NORTH ATLANTIC UNIVERSITY UNION
-
White Papers
Criticality Aware Access Control Model for Pervasive Applications
Jan 2011
Access control policies define the rules for accessing system resources. Traditionally, these are designed to take a reactive view for providing access, based on explicit user request. This...
Provided by Arizona State University
-
White Papers
Communication in a Poisson Field of Interferers - Part II: Channel Capacity and Interference Spectrum
Jan 2010
In their previous paper, the authors presented a mathematical model for communication subject to both network interference and noise, where the interferers are scattered according to a spatial...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Spectrum Management for Cognitive Radio Based on Genetics Algorithm
Jan 2011
Spectrum scarceness is one of the major challenges that the present world is facing. The efficient use of existing licensed spectrum is becoming most critical as growing demand of the radio...
Provided by Gyan Vihar Universe
-
White Papers
Spectrum Sensing Based on Blindly Learned Signal Feature
Feb 2011
Spectrum sensing is the major challenge in the Cognitive Radio (CR). The authors propose to learn local feature and use it as the prior knowledge to improve the detection performance. They define...
Provided by Tennessee Technological University
-
White Papers
GLRT-Based Spectrum Sensing With Blindly Learned Feature Under Rank-1 Assumption
Mar 2011
Prior knowledge can improve the performance of spectrum sensing. Instead of using universal features as prior knowledge, the authors propose to blindly learn the localized feature at the secondary...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Algebraic Hybrid Satellite-Terrestrial Space-Time Codes for Digital Broadcasting in SFN
Mar 2011
Lately, different methods for broadcasting future digital TV in a Single Frequency Network (SFN) have been under an intensive study. To improve the transmission to also cover suburban and rural...
Provided by University of Turku
-
White Papers
Evolutionary Game and Learning for Dynamic Spectrum Access
Mar 2011
Efficient dynamic spectrum access mechanism is crucial for improving the spectrum utilization. In this paper, the authors consider the dynamic spectrum access mechanism design with both complete...
Provided by Chinese University of Hong Kong
-
White Papers
Channel Estimation and Multiuser Detection in Asynchronous Satellite Communications
Nov 2010
In this paper, the authors propose a new method of channel estimation for asynchronous additive white Gaussian noise channels in satellite communications. This method is based on signals...
Provided by University of Carthage
-
White Papers
Application of DAC Codeword Spectrum: Expansion Factor
Oct 2010
Distributed Arithmetic Coding (DAC) proves to be an effective implementation of Slepian-Wolf Coding (SWC), especially for short data blocks. To study the property of DAC codewords, the author has...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Application of a Design Space Exploration Tool to Enhance Interleaver Generation
Jun 2007
This paper presents a methodology to efficiently explore the design space of communication adapters. In most Digital Signal Processing (DSP) applications, the overall performance of the system is...
Provided by STMicroelectronics
-
White Papers
Achievable Outage Rates With Improved Decoding of Bicm Multiband OFDMA Under Channel Estimation Errors
Aug 2007
The authors consider the decoding of Bit Interleaved Coded Modulation (BICM) applied to multiband OFDM for practical scenarios where only a noisy (possibly very bad) estimate of the channel is...
Provided by CNRS
-
White Papers
The Internet Ecosystem - The Potential for Discrimination
Mar 2010
The Federal Communication Commission is considering rules enforcing "Network neutrality" and legislation proposing similar goals have been discussed in Congress. The goals of the proposed...
Provided by University of Colorado
-
White Papers
Reliability and Cost Reduction of Solar Arrays for GEO Satellites
Sep 2008
Power delivery over the mission life is critical to all satellites; therefore solar arrays must be reliable and live up to predicted on-orbit performance. Space satellite insurance claims were...
Provided by Auburn University
-
White Papers
Effects of Access-Control Policy Conflict-Resolution Methods on Policy-Authoring Usability
Mar 2009
Access-control policies can be stated more succinctly if they support both rules that grant access and rules that deny access, but this introduces the possibility that multiple rules will give...
Provided by Carnegie Mellon University
-
White Papers
A User Study of Policy Creation in a Flexible Access-Control System
Apr 2008
Significant effort has been invested in developing expressive and flexible access-control languages and systems. However, little has been done to evaluate these systems in practical situations...
Provided by Association for Computing Machinery
-
White Papers
Efficient Proving for Practical Distributed Access-Control Systems
Jul 2009
The authors present a new technique for generating a formal proof that an access request satisfies access-control policy, for use in logic-based access-control frameworks. The approach is tailored...
Provided by Carnegie Mellon University
