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voip - ip telephony
(1231 results)-
White Papers
Web Enabled Collaborative Climate Visualization in the Earth System Grid
Mar 2008
The recent advances in high performance computing, storage and networking technologies have enabled fundamental changes in current climate research. While sharing datasets and results is already...
Provided by University of Tennessee
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Whitepapers
A Theoretical Model of the Effects of Losses and Delays on the Performance of SIP
Oct 2008
The Session Initiation Protocol (SIP) is widely used for VoIP communication. Losses caused by network or server overload would cause retransmissions and delays in the session establishment and...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
The nGenius Service Assurance Solution Enables Operators to Assure Voice Quality in Modern IP Service Delivery Networks
May 2010
With the introduction of Voice over IP (VoIP) into service provider networks comes the need to manage voice service quality. Voice, in next generation, converged networks, at face value, is...
Provided by NetScout Systems
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White Papers
Beyond MOS - Ensuring VoIP Service Quality
Jun 2010
As VoIP traffic continues to climb, CSPs are faced with the challenge of ensuring VoIP call quality. Monitoring of real-time VoIP services is complex, and existing IP network management solutions...
Provided by Stratecast
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White Papers
A Security Model for VoIP Steganography
Jul 2009
In 2005, an extensive taxonomy of threats for VoIP was published by a prominent industry group. Strangely, this taxonomy does not identify stegocommunication as a threat, even though many...
Provided by Tsinghua University
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White Papers
Towards a Security Policy for VoIP Applications
Jan 2010
Recently Voice over Internet Protocol (VoIP) technology is attracting more and more attention and interest in the industry. VoIP applications such as IP telephony systems involve sending voice...
Provided by University of Ontario Institute of Technology
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White Papers
Performance Evaluation of VoIP Services Using Different CODECs Over a UMTS Network
Jan 2009
This paper evaluates the performance of Voice over Internet Protocol (VOIP) services that use different compression and decompression (CODEC) schemes, over a hybrid network that includes a...
Provided by RMIT University
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White Papers
An Analytical Framework of Survivability Model for VoIP
Oct 2009
Nowadays Voice over Internet Protocol (VoIP) has become an evolutionary technology in telecommunications, and hence it is very important to study and enhance its survivability measures. In this...
Provided by Indian Institute of Technology Delhi
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White Papers
Improving Audio Quality in VoIP Conferencing Services
Mar 2009
Audio conferencing services based on circuit switched networks and audio bridging equipment have provided hosted conferencing users with a benchmark for pricing and quality in voice...
Provided by RadiSys
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White Papers
VoIP and Quality, a System, Not a Product?
May 2008
In its simplest, VoIP is the transmission of voice communications over any data network utilizing the TCP/IP protocol, including the Internet. VoIP is here to stay. It's not some flashy,...
Provided by Netlink Technologies
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White Papers
Maintaining the Edge: Voice Quality Management in a VoIP Environment
Apr 2008
The migration to next-generation IP networks has been a gradual one, as carriers have balanced new service deployment with the reality that the IP world lacked comprehensive and cost-effective...
Provided by Data Connection
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White Papers
Towards Energy Efficient VoIP Over Wireless LANs
May 2008
Wireless LAN (WLAN) radios conserve energy by staying in sleep mode. With real-time applications like VoIP, it is not clear how much energy can be saved by this approach since packets delayed...
Provided by Association for Computing Machinery
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White Papers
A Traffic Engineering Approach for Placement and Selection of Network Services
Dec 2007
Network services are provided by means of dedicated service gateways, through which traffic flows are directed. Existing work on service gateway placement has been primarily focused on minimizing...
Provided by Israel Institute of Technology
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White Papers
The Design of VoIP Systems With High Perceptual Conversational Quality
Dec 2008
This paper describes the work on real-time two-party and multi-party VoIP (voice-over-IP) systems that can achieve high perceptual conversational quality. It focuses on the fundamental...
Provided by University of Illinois
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White Papers
Implementing VoIP?: Cover the Bases
Feb 2009
Convergence of voice and data networks, in the first instance by implementing a VoIP telephony system, is gaining huge momentum in the marketplace. For example, the telecoms research company,...
Provided by MorganDoyle
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White Papers
A Realisitic VoIP Traffic Generation and Evaluation Tool for OMNeT++
Mar 2008
The fraction of voice over Internet Protocol (VoIP) based telephone calls among the totality of voice based communication acts has been significantly growing during the last years. In wired, as...
Provided by Association for Computing Machinery
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White Papers
Performance of VoIP Services Over 3GPP WCDMA Networks
Jul 2008
The paper analyzes the performance of voice services over 3GPP WCDMA Networks for Release 99 and Release 7 deployments. This paper shows, by using simulations, that the system capacity of Release...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
A Case for WiFi Relay: Improving VoIP Quality for WiFi Users
Feb 2010
Voice over Internet (VoIP) has been experiencing enormous growth in recent years. While posed to replace traditional PSTN for both enterprise and residential customers, VoIP has yet to achieve the...
Provided by Microsoft
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White Papers
Performance of VoIP Call Set-Up Over Satellite-UMTS Using Session Initiation Protocol
Jan 2010
Session Initiation Protocol (SIP) is an application layer signalling protocol used in the IP-based Universal Mobile Telecommunication Systems (UMTS) network for establishing multimedia sessions....
Provided by University of Surrey
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White Papers
Detailed Analysis of Skype Traffic
Jan 2009
Skype is beyond any doubt the VoIP application in the current Internet application spectrum. Its amazing success has drawn the attention of telecom operators and the research community, both...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Improving VoIP Capacity in Multi-Rate IEEE 802.11e WLANs Via Relay
Apr 2010
In order to improve the Voice over IP (VoIP) capacity of a Wireless Local Area Network (WLAN), the paper develops a relay-aided solution, which includes a relay-aided admission control scheme, a...
Provided by Iowa State University
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White Papers
Towards Secure SIP Signalling Service for VoIP Applications
May 2009
Current Voice over IP (VoIP) services are regarded less secure than the traditional Public Switched Telephone Network (PSTN). This is due to the fact that VoIP services are frequently deployed in...
Provided by Karlstad University
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White Papers
D(e|i)aling With VoIP: Robust Prevention of DIAL Attacks
Feb 2010
This paper carries out attacks using Internet services that aim to keep telephone devices busy, hindering legitimate callers from gaining access. The paper uses the term DIAL (Digitally Initiated...
Provided by Foundation for Research and Technology - FORTH
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White Papers
VoIP in Developing Countries: The Next Disruptive Technology?
May 2008
Voice over Internet Protocol (VoIP) has not proven itself as a disruptive technology in the developed world, but it may prove to be disruptive to un-served and under-served customer segments in...
Provided by Temple University
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White Papers
Tracking Encrypted VoIP Calls Via Robust Hashing of Network Flows
Mar 2010
In this work the authors propose a Voice over IP (VoIP) call tracking scheme based on robust hashing of VoIP flows. In the proposed scheme the audio content of a possibly encrypted VoIP flow is...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
A Protocol Specification-Based Intrusion Detection System for VoIP and Its Evaluation
Dec 2008
The paper proposes an architecture of Intrusion Detection System (IDS) for VoIP using a protocol specification-based detection method to monitor the network traffics and alert administrator for...
Provided by Institute of Electronics, Information and Communication Engineers
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White Papers
Pr2-P2PSIP: Privacy Preserving P2P Signaling for VoIP and IM
Aug 2010
In the last few years, there has been a good deal of effort put into the research and standardization of P2P-based VoIP signaling, commonly called P2PSIP. However, there has been one important...
Provided by Association for Computing Machinery
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White Papers
Mobile IP as an Enabling Technology for VoIP in Metropolitan Wireless Mesh Networks
Feb 2008
Metropolitan wireless mesh networks are being deployed to provide broadband connectivity to city-wide hotspots. However, its commercial feasibility and business model have not yet proven...
Provided by Helsinki University of Technology
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White Papers
Packetization and Silence Influence on VoIP Traffic Profiles
Jan 2010
This paper presents an experimental study that extends the current knowledge of the VAD/DTX codec influence in the transmission rate. It considers the new GSM AMR codec as well as G.723.1 and...
Provided by Universidad de Sevilla
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White Papers
An Ontology Based-Policy for Deploying Secure SIP- Based VoIP Services
Apr 2010
Voice services over Internet Protocol (VoIP) are nowadays much promoted by telecommunication and Internet service providers. However, the utilization of open networks, like the Internet, raises...
Provided by University of the Aegean
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White Papers
VoIP on Wireless Meshes: Models, Algorithms and Evaluation
Jan 2010
The paper studies the problem of supporting VoIP calls in a wireless mesh network. Specifically, the paper proposes solutions for Call Admission Control (CAC) and route selection for VoIP calls....
Provided by Stony Brook University
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White Papers
Woods Bagot Case Study
Sep 2010
Global architectural and design firm, Woods Bagot, distinguishes itself by its unique "one global studio" model, in which the company leverages its expansive worldwide talent pool of about 1,000...
Provided by TANDBERG, now part of Cisco
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Whitepapers
5 Steps to Improving the Audio Conferencing Experience
Sep 2010
This new white paper explores the strategic role of audio conferencing in corporate business plans and presents 5 steps for enhancing the audio conferencing experience.
Provided by Citrix Online
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Webcasts
Video: Cisco TelePresence Vision
Sep 2010
This video shows Cisco Telepresence products and how they power the new way of working, where everyone, everywhere can be more productive through face-to-face collaboration, and how this changes...
Provided by TANDBERG, now part of Cisco
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Webcasts
Video: Cisco TelePresence for Everyone, Everywhere
Sep 2010
This video discusses how Cisco TelePresence powers the new way of working, where everyone, everywhere can be more productive through face-to-face collaboration. Welcome to your future at work, in...
Provided by TANDBERG, now part of Cisco
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White Papers
Executive Brochure: Accelerating the Pace of Business with Cisco TelePresence
Sep 2010
The New Way of Working: Today you face greater business demands and a more competitive marketplace. You must continually find new ways to be agile and increase speed to market while reducing...
Provided by TANDBERG, now part of Cisco
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White Papers
Cisco TelePresence Product Portfolio
Sep 2010
Cisco TelePresence® solutions power the new way of working, where everyone, everywhere can be more productive through face-to-face collaboration. Discover the full range of Cisco TelePresence...
Provided by TANDBERG, now part of Cisco
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White Papers
Cisco's Acquisition of TANDBERG: Customer, Channel, and Market Impact
Sep 2010
Cisco's acquisition of TANDBERG represents an inflection point in the video conferencing and telepresence market. It is a step toward blurring the lines between the various forms of video...
Provided by TANDBERG, now part of Cisco
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White Papers
Cisco TelePresence and Collaboration Overview
Sep 2010
Changing the Way People Communicate and Collaborate: Welcome to your future at work, in class, on the road, in your community and at home. As a key part of Cisco Collaboration, Cisco TelePresence™...
Provided by TANDBERG, now part of Cisco
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White Papers
Cisco TelePresence Services: Bringing Value to Your Organization
Sep 2010
Realize the full value of your Cisco TelePresence™ investment and accelerate successful global deployments through services delivered by Cisco and our certified partners. Critical to achieving the...
Provided by TANDBERG, now part of Cisco
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Whitepapers
Cisco Secure Mobility Solution
Apr 2012
When users access the Internet from their corporate office, their traffic is checked by a proxy-server for Acceptable Use Policy (AUP) controls, but when the same corporate computers connect from...
Provided by Global Knowledge
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White Papers
Adaptive Partial-Matching Steganography for Voice Over IP Using Triple M Sequences
Jul 2011
Although steganographic transparency and steganographic bandwidth are believed to be two conflicting objectives in the design of steganographic systems, it is possible and necessary to strike an...
Provided by Reed Elsevier
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White Papers
Reduce the Risk-and Cost-of Mobility by Securely Managing Your Mobile Devices
Mar 2012
With the country experiencing a sluggish economy, it's harder than ever for schools to come up with the necessary resources. Despite dramatic declines in both state and local funding in most...
Provided by Absolute Software
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White Papers
Five Top Tips for Choosing a Telecoms Partner for Social Media and Internet Applications
Mar 2012
Bringing universal mobile services such as voice, SMS and mobile phone numbers to the web environment is the latest focus of internet and social networking businesses. Facebook provides a...
Provided by TynTec
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Case Studies
New University Manages Rapid Growth
Jan 2011
Yasar University was founded in 2001, with the goal of helping students excel both academically and as members of society. Early expansion was rapid, and the institution soon began to outgrow its...
Provided by Cisco Systems
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Case Studies
Stationery Firm Improves Customer Service
Jan 2011
Libesa is one of Chile's best-known manufacturers of stationery and office supplies. Their challenge is to improve its responsiveness to customers by streamlining and integrating communications...
Provided by Cisco Systems
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White Papers
Speech Quality Aware Admission Control for Fixed IEEE 802.16 Wireless MAN
Aug 2009
The authors present an Admission Control (AC) algorithm for the specific case of pre-provisioned IEEE 802.16d links for VoIP aggregates. The algorithm approaches AC from a new perspective as...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
On Autonomic QoS Provisioning for Voice Over IP Services
Aug 2009
In this paper, the authors present a framework for autonomic QoS provisioning for VoIP services. The central role is held by a Measurement Based Admission Control algorithm which incorporates...
Provided by University of Coimbra
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White Papers
A Qualitative Study in Consumer Behavior of Skype Internet Phone
Nov 2011
Various Internet applications have mushroomed for years in many different fields, but only a few of them have survived in the market. One of them is the Skype Internet phone service which has been...
Provided by National Yunlin University of Science and Technology
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White Papers
Optimal Rate Adaptation for VoIP Over Wireless Tandem Links
Oct 2010
The authors present an optimization framework for transmitting VoIP packets generated by a multi-rate voice encoder over error-prone wireless links. Their proposed framework aims at identifying...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Non-Intrusive Speech Quality Prediction in VoIP Networks Using a Neural Network Approach
Nov 2008
Measuring speech quality in Voice over Internet Protocol (VoIP) networks is an increasingly important application for legal, commercial and technical reasons. Any proposed solution for measuring...
Provided by Reed Elsevier
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White Papers
Enable VoIP Survivability for Future Tactical Airborne Networks
Oct 2010
Modern Line Of Sight (LOS) radio technologies including software defined radios are the fundamental building blocks of the future game-changing High-Speed and High-Capacity Internet Protocol based...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Secured Secret Sharing Over Single Path in VoIP With Consistent Data Transfer
Jan 2012
Voice over Internet Protocol (VoIP) is a new fancy and up growing technology. A major change in telecommunication industry is VoIP. The transmission of Real time voice data is not as easy as...
Provided by International Journal of Computer Science and Telecommunications
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White Papers
Radio Resource Management in Emerging Heterogeneous Wireless Networks
Feb 2010
Deployment of heterogeneous wireless networks is spreading throughout the world as users want to be connected anytime, anywhere, and anyhow. Meanwhile, these users are increasingly interested in...
Provided by Reed Elsevier
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White Papers
Traffic Analysis Attacks on Skype VoIP Calls
Dec 2010
Skype is one of the most popular Voice-over-IP (VoIP) service providers. One of the main reasons for the popularity of Skype VoIP services is its unique set of features to protect privacy of VoIP...
Provided by Reed Elsevier
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White Papers
Predicting Feature Interactions by Using Inconsistency Models
Sep 2008
Internet applications, such as Email, VoIP and WWW have been enhanced with many features. However, the introduction and modification of features may result in undesired behaviours, and this effect...
Provided by Reed Elsevier
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White Papers
Charging in IP Multimedia Networks
Jul 2010
IMS charging can be performed at various planes of the IMS architecture. Different charging schemes may be utilized. The optimal charging scheme would be service dependent, but may also be...
Provided by University of Cape Town
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White Papers
Adding Location-Based Services Support to the Mobicents Service Delivery Platform
Jul 2010
Research has indicated that there has been a steady increase in the number of location-aware devices and applications and that this trend is likely to continue well into the future. The private...
Provided by Rhodes University
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White Papers
Proposal, Implementation, and Evaluation of a QoS-Aware Routing Mechanism for Multi-Channel Multi-Interface Ad-Hoc Networks
Jul 2008
Without any control mechanism, a wireless ad-hoc network is easily congested and the perceived quality of applications considerably deteriorates. Therefore, the authors need QoS control mechanisms...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
A Transport-Layer Approach for Achieving Predictable Throughput for Internet Applications
Aug 2008
The authors propose a transport-layer approach to provide predictable throughput for applications requiring stable bandwidth resource, such as video streaming and VoIP. The proposed mechanism...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Adaptability of Virtual Network Topology Control Based on Attractor Selection
Aug 2009
In recent years, the Internet accommodates various kinds of traffic generated by new applications, such as P2P, VoIP, and video streaming services. Since traffic of these applications gives...
Provided by Osaka University
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White Papers
Session-Based Classification of Internet Applications in 3G Wireless Networks
Aug 2011
Accurately classifying and identifying wireless network traffic associated with various applications, such as Web, VoIP, and VoD, is a challenge for both service providers and network operators....
Provided by Reed Elsevier
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White Papers
A New Framework Design for IPTV
Nov 2011
An IPTV is a system used to deliver television services to the consumers who are registered subscribers for this system. This delivery of digital television is made possible by using Internet...
Provided by IJCTT-International Journal of Computer Trends and Technology
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White Papers
Handover Optimization for Real-Time Application in Mobile WiMAX / IEEE 802.16e
Jun 2010
The demand for wireless broadband services is growing rapidly. Mobile WiMAX is one of the most promising technologies for broadband wireless communication. It allows users to roam over the network...
Provided by Liverpool John Moores University
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White Papers
Evaluation of Users' Perspective on VoIP's Security Vulnerabilities
Dec 2011
Voice over Internet Protocol (VoIP) represents a major newish trend in telecommunications and an alternative to traditional phone systems. VoIP uses IP networks and therefore inherits their...
Provided by University of South Australia
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White Papers
New Approaches to Mitigation of Malicious Traffic in VoIP Networks
Dec 2010
Voice over IP (VoIP) telephony is becoming widespread in use, and is often integrated into computer networks. Because of this, malicious software threatens VoIP systems in the same way that...
Provided by University of Canterbury
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White Papers
Developing Robust VoIP Router Honeypots Using Device Fingerprints
Dec 2010
As the telegram was replaced by telephony, so to Voice over IP (VoIP) systems are replacing conventional switched wire telephone devices, these systems rely on the Internet connectivity for the...
Provided by Edith Cowan University
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White Papers
Security Analysis of Session Initiation Protocol - A Methodology Based on Coloured Petri Nets
Dec 2010
In recent years Voice over Internet Protocol (VoIP) has become a popular multimedia application over the Internet. At the same time critical security issues in VoIP have started to emerge. The...
Provided by University of South Australia
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White Papers
Guide to Starting Your Own Calling Card Business Share
Feb 2012
A Calling Card business is a popular kind of activity in the VoIP sphere. The Calling Card platform allows one to provide subscribers with international or long distance calls via a VoIP network....
Provided by Speedflow Communications
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Podcasts
Scalable VoIP Mobility Integration and Deployment
Jan 2012
In this podcast, the speaker explains how to design their Wireless LANs for a VoIP deployment, as well as teaching people to use AirMagnet's VoFi Analyzer. The speaker discusses about Network...
Provided by Wireless LAN Professionals
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Case Studies
Croatian Automobile Dealership Improves Service and Sales
Nov 2009
AutoZubak challenge is to help callers reach the right person, the first time and meet the needs of a mobile workforce. AutoZubak decided to replace its standalone PBX systems with a centralized...
Provided by Cisco Systems
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Case Studies
All-IP Service Provider Achieves 99% Provisioning Flowthrough
Jun 2008
Cbeyond is a company on the fast track one of the Voice over Internet Protocol (VoIP) service providers. The systems and spreadsheets that Cbeyond had been relying on to reserve and assign network...
Provided by Telcordia Technologies
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White Papers
A Study on Countering VoIP Spam Using RBL
Jan 2012
A threat of VoIP spam is becoming more and more actualized with the growth of VoIP service. Currently, most spammers send spam through internet telephony because they are possible to send spam in...
Provided by International Association of Computer Science & Information Technology (IACSIT)
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White Papers
Multiple Access Techniques in 4G
Jul 2011
Yet there are several challenges that inhibit the progress of 4G and researchers throughout the world are contributing their ideas to solve these challenges. Fourth Generation is the next...
Provided by Planetary Scientific Research Center
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White Papers
Security in VoIP Network Using Neural Network and Encryption Techniques
Jan 2012
Voice over Internet Protocol is one of the fastest growing applications. Since VoIP networks are very much vulnerable to attacks, providing security in such networks is a matter of great concern....
Provided by International Association of Computer Science & Information Technology (IACSIT)
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White Papers
Adaptive Localized Active Route Maintenance Mechanism to Improve Performance of VoIP over Ad Hoc Networks
Feb 2011
An important characteristic of a mobile ad hoc network routing protocol is connectivity maintenance. The protocol's ability to maintain routes and react to topology changes due to link failures...
Provided by Academy Publisher
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White Papers
Exploring Attributes for Selecting VoIP Service in Korea
Jan 2012
In Korea, the number of VoIP users is expected to rapidly increase after introducing VoIP number portability on October 31, 2008. The total number already gone beyond 2 million, and the number of...
Provided by International Association of Computer Science & Information Technology (IACSIT)
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White Papers
Multiplexing SIP Applications Voice Packets Between SWVG Gateways
Jan 2012
SIP applications are expected to dominate the VoIP area in the near future. Unfortunately, the small packet size sending by SIP applications causes packet overhead and network overload. That is,...
Provided by International Association of Computer Science & Information Technology (IACSIT)
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White Papers
Modified Secret Sharing Over a Single Path in VoIP With Reliable Data Delivery
Jan 2012
Voice over Internet Protocol (VoIP) is a new fancy and up growing technology. A major change in telecommunication industry is VoIP. The transmission of Real time voice data is not as easy as...
Provided by International Journal of Computer Science Issues
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White Papers
Traffic Trading in the Competitive International Voice Market
Aug 2009
This paper highlights the trends that are reshaping the international long distance voice market. The authors' analysis focuses on voice exchanges, namely, electronic marketplaces where huge...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
NS-2 Extension for Dynamic Optimization Within Multiple VoIP Sessions Over Wireless Networks
Nov 2009
The Network Simulator NS-2 is a versatile extendable tool that is widely used in the networking community. It provides support for simulation of many protocols over networks including 802.11e. To...
Provided by National University Of Ireland
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White Papers
A Survey of VoIP Implementations in Taiwan 500 Biggest Export-Import Enterprises
Nov 2007
Voice over Internet Protocol (VoIP) is a critical innovation technology in the globally oriented business world, which emphasizes flexibility and efficiency as means to reduce operation cost and...
Provided by National Cheng Kung University
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White Papers
The Design of a Multi-Party VoIP Conferencing System Over the Internet
Jan 2008
This paper presents the design of a VoIP conferencing system that enables the voice communication of multiple users in the Internet. After studying the conversational dynamics in multi-party...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
A Mathematical Model of the Skype VoIP Congestion Control Algorithm
Dec 2008
The Internet is changing from being only an efficient platform for data delivery to become also a platform for audio/video applications. The stability of the traditional Internet is due to the TCP...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Economic Mechanisms for Protecting VoIP Services Within the IMS
Jul 2008
The IP Multimedia Subsystem (IMS) is the proposed Next Generation Network (NGN) architecture that will be used to provide revolutionary services based on an IP backbone. For successful IMS...
Provided by University of Cape Town
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White Papers
An Efficient Scheduling Scheme to Enhance the Capacity of VoIP Services in Evolved UTRA Uplink
Mar 2008
An efficient scheduling scheme is proposed to increase the available capacity of VoIP services over evolved UTRA uplink. On top of the advantages of persistent scheduling, the proposed scheme...
Provided by Yonsei University
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White Papers
Task Dependency of User Perceived Utility in Autonomic VoIP Systems
Dec 2007
The transmission of voice-over-Internet protocol (VoIP) network traffic is used in an increasing variety of applications and settings. Many of these applications involve communications where VoIP...
Provided by Drexel University
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White Papers
Five Steps to Ensuring a Successful VoIP Migration
Mar 2009
Voice over IP (VoIP) has arrived and is here to stay. Many contact centers are realizing the increased flexibility and cost advantages of placing voice traffic on existing data networks. This...
Provided by inContact
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White Papers
The Implementation of Speaker Recognition on VoIP Auditing in Gigabit High-Speed Environment
Nov 2009
VoIP(Voice over Internet Protocol) is low-cost, flexible and brings great convenience to people's life, but it also brings security problems such as cyber-crime issues. This paper aims to solve...
Provided by Academy Publisher
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White Papers
Joint Pre-Echo Control and Frame Erasure Concealment for VoIP Audio Codecs
Aug 2009
Pre-echo artifacts are a common problem of transform audio codecs owing to their comparatively large block lengths. If such codecs are used in Voice-over-IP (VoIP) applications, the concealment of...
Provided by EURASIP
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White Papers
Protecting VoIP Services Against DoS Using Overload Control
Jul 2008
Like any other Internet-based service VoIP servers can be the target of denial of service attacks. While operators will certainly deploy various mechanisms to prevent such attacks, detecting and...
Provided by Tekelec
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White Papers
Supporting VoIP Services in IEEE 802.11e WLANs
Sep 2009
Voice over Internet Protocol (VoIP) over Wireless Local Area Network (WLAN) is becoming popular thanks to its cost efficiency. How-ever, it has been a challenge to provide good quality of VoIP...
Provided by Iowa State University
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Whitepapers
Privacy in VoIP Networks: A K-Anonymity Approach
Jan 2009
Peer-to-Peer VoIP (voice over IP) networks, exemplified by Skype, are becoming increasingly popular due to their significant cost advantage and richer call forwarding features than traditional...
Provided by IBM
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White Papers
Voice-TFCC: A TCP-Friendly Congestion Control Scheme for VoIP Flows
Jun 2008
Typically, VoIP traffic is deployed as best-effort traffic over Internet links. This voice traffic lacks effective and scalable end-to-end congestion control. The paper proposes a new VoIP...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Statistical Analysis and Modeling of Internet VoIP Traffic for Network Engineering
Jan 2010
Network engineering for Quality-of-Service (QoS) of Internet voice communication (VoIP) can benefit substantially from simulation study of the VoIP packet traffic on a network of routers. This...
Provided by Purdue University
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White Papers
Rural Telemedicine Networks Using Store-and-Forward Voice-Over-IP
Aug 2009
Store and forward Voice-over-IP is a suggested solution for supporting Telemedicine at rural health clinics in developing countries. Solutions described to date are designed to support...
Provided by European Federation for Medical Informatics
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White Papers
VoIP LAN/MAN Traffic Analysis for NGN QoS Management
Oct 2009
Strict requirement is emphasized regarding QoS guarantees of the NGN (Next Generation Network) networks today. DiffServ mechanism is applied mostly for classification of protocol data units of...
Provided by University of Debrecen
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White Papers
Telemedicine Using VoIP Combined With a Store and Forward Approach
Jan 2010
Rural areas in South Africa have unique conditions such as remoteness and scarcity of reliable public facilities. Information and Communication Technologies (ICTs) introduced into these areas must...
Provided by University of Cape Town
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White Papers
Analysis of the Perceived VoIP Quality Under Various Wireless Network Conditions
Feb 2010
This paper focuses on the comparative statistical analysis of the performance of VoIP calls under various situations, namely, during a handover, under different background traffic conditions...
Provided by Technical University of Crete
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White Papers
Eliminating Handoff Latencies in 802.11 WLANs Using Multiple Radios: Applications, Experience, and Evaluation
Jan 2010
Deployment of Voice-over IP (VoIP) and other real-time streaming applications has been somewhat limited in wireless LANs today, partially because of the high handoff latencies experienced by...
Provided by University of Wisconsin-Madison
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Case Studies
Lewis Brisbois Bisgaard & Smith Proves the Case for Polycom and Broadsmart IP UC Solutions
Feb 2010
For Lewis Brisbois Bisgaard & Smith LLP (LBBS), time is money. That's true for any law firm, but with more than 750 attorneys and over 20 offices, LBBS isn't just any law firm. The company...
Provided by Polycom
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Case Studies
Zultys - VoIP Call Centre Deployment
Jan 2010
Isuzu-General Motors Australia truck division (Isuzu Trucks) import, distribute, and support a wide range of state of the art commercial vehicles, ranging from 4 tones through to 68 tones. Isuzu...
Provided by Globalnet Solutions Australia
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Case Studies
Voice Over IP Is a Sound Investment for Leading Banking Firm
Mar 2009
Founded in 1929, Sterling National Bank, a subsidiary of Sterling Bancorp (NYSE: STL), offers a full range of banking and financial services products, combined with a unique high-touch approach to...
Provided by Polycom
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Case Studies
Tæppeland Improves Customer Service and Sales Performance With Polycom Wireless Telephony Solution
Sep 2009
Tæppeland, Denmark's leading domestic and commercial flooring retailers. Tæppeland have very large premises throughout the country, where the staff was often under pressure to answer a ringing...
Provided by Polycom
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Case Studies
Polycom NGT UC Solutions for Small Business Help ASG Save Money and Enhance Efficiency
Feb 2010
Advanced Systems Group (ASG) is a national open systems integrator found that there was a need for effective communication between headquarters and remote offices. ASG decided it was time to make...
Provided by Polycom
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Case Studies
Polycom IP Telephony Solutions Deliver Concrete Benefits to Arabian Cement Company
Jul 2009
Arabian Cement Company wanted an integrated communication network system for effective communications with isolated and geographically dispersed sites is an important issue. With a growing network...
Provided by Polycom
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Case Studies
Polycom Mobile Telephony Solution Enhances Communication and Improves Efficiency at Campus IFOM-IEO
Mar 2009
Challenge in front of Milan-based Campus IFOM-IEO was to provide key users at the institute with a roaming telephony service that would enable reliable communication at all times wherever they are...
Provided by Polycom
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Case Studies
Polycom Solution Delivers Lesson in Roaming Communication for Lausanne Nursery Schools
Aug 2008
The challenge in front of Lausanne nursery schools was To provide a flexible, robust, roaming communication solution for staff at six nurseries operated by the City of Lausanne that has good...
Provided by Polycom
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Case Studies
Polycom Global Services Helps Colorado Department of Transportation Ensure Successful Video Conferencing Implementation
May 2010
For the Colorado Department of Transportation (CDOT), responsible for a 9,134-mile highway system handling more than 48 billion vehicle miles of travel annually, the budget impact of travel can be...
Provided by Polycom
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Case Studies
Edgewater Systems Leverages JEP-Hosted Polycom VoIP Solution for Cost Savings, Business Continuity, and Productivity Gains
Feb 2010
Reliable phone service is key to the organization for communicating with current and potential clients, whether scheduling routine appointments or use in an emergency situation. The existing...
Provided by Polycom
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Case Studies
Polycom VoIP Solutions, TMC, and Adaption Technologies Drive Down Retail Costs for Incredible Pizza
Sep 2009
With stores ranging in size from 22,000 to 90,000 square feet, opening a new Incredible Pizza Company location represents a significant investment. To reduce its costs - and to help offset the...
Provided by Polycom
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Whitepapers
An Aggregative Approach for Scalable Detection of DoS Attacks
Oct 2008
In Voice Over IP (VoIP) systems, intruders can launch DoS attacks by establishing a large number of open connections to prevent the system from serving legitimate users. Existing defenses against...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
A Novel Protocol Design and Collaborative Forensics Mechanism for VoIP Services
Feb 2012
The simplicity and low cost of Voice over Internet Protocol (VoIP) services has made these services increasingly popular as the Internet has grown. Unfortunately, these advantages of VoIP are...
Provided by Academy Publisher
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White Papers
Voice over IP over GPRS
May 2008
The Voice over IP (VoIP) technology has become prevalent today due to its lower cost than traditional telephony and its ability to support new value-added services. Additionally, the increasing...
Provided by KTH Royal Institute of Technology
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Webcasts
How to use TCO to build a business case for Unified Communications
Oct 2010
Discover how to provide quantifiable bottom-line proof to support a unified communications purchase.
Provided by ShoreTel
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White Papers
A Strategic View of Application Converged Networks
Oct 2010
Access real-world lessons learned to help you successfully deploy a converged network. See how your technology choices can reduce complexity and costs while helping guarantee your convergence...
Provided by Alcatel-Lucent
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Whitepapers - Video
See the possibilities of a future with an Application Fluent Network
Oct 2010
See how an Alcatel-Lucent Application Fluent Network can help you build a high performing, low complexity converged network. No matter what industry you're in, get the performance you need to meet...
Provided by Alcatel-Lucent
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Product Specs
Avaya Aura Collaboration Server
Sep 2010
Today's businesses must be one step ahead of the competition. Productivity-enhancing communications solutions are a key element of an overall strategy. However, trialing new applications can be...
Provided by Avaya
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Product Specs
IP Office Mobile Worker: One Number Access for Employees on the Road
Jan 2010
For staff who are often out of the office, but don't require a laptop, IP Office Mobile Worker (available with IP Office Preferred Edition and Advanced Edition) keeps them readily accessible....
Provided by Avaya
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Product Specs
IP Office Power User: Stay Connected and Productive - Anywhere
Feb 2010
The ultimate in communications accessibility, IP Office Power User enables executives and managers to be as productive as possible in virtually any circumstances. Whether in the office, down the...
Provided by Avaya
