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voip - ip telephony
(1230 results)-
Case Studies
Family Caregivers Receive Support at Point of Care
Jan 2008
University of Miami Center wanted to help family members serve as an extension of the medical system. University of Miami Center provided video-based counseling and skills training, support...
Provided by Cisco Systems
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Case Studies
Manufacturer Moves Ideas Instead of People
Sep 2008
Biesse America wanted to simplify communications among employees in three countries and reduce voice and travel costs. The challenge was to improve customer service. Biesse America replaced...
Provided by Cisco Systems
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Case Studies
Distributor Improves Customer Service With Faster Answers
Jun 2008
Cross Company wanted to enhance customer service and help employees get answers more quickly. The challenge was to unify communications across 12 locations. Cross Company consolidated all branches...
Provided by Cisco Systems
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Case Studies
Global Manufacturer Increases Collaboration and Reduces Cost
May 2008
Voith AG is one of the best-kept secrets in the world. It comes as a surprise to most people to learn that one sheet of paper in three in the world is made on machines produced by Voith. Voith AG...
Provided by Cisco Systems
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Case Studies
Software Developer Accelerates Innovation
Sep 2008
Headquartered in Santa Monica, California, Activision, Publishing, Inc. is a leading worldwide developer, publisher, and distributor of interactive entertainment and leisure products. Activision...
Provided by Cisco Systems
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Case Studies
Cisco Helps Swiss National Broadcaster Transform efficiency, Cost and Productivity for Remote Location Broadcasting
Aug 2008
SRG SSR is the national broadcast organisation for Switzerland. It is a not-for-profit organization and operates under a Swiss Federal Constitution charter to provide a range of broadcast...
Provided by Cisco Systems
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Case Studies
Rome's Largest Hospital Modernizes Patient Care Using 3Com Voice and Data Systems
Jan 2010
Founded in 1926, San Camillo Forlanini is Rome's largest hospital and considered by many to be the biggest in Europe. San Camillo Forlanini improved its network performance in 2000 by...
Provided by Hewlett-Packard (HP)
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Case Studies
HP Case Study: Oswald & Yap
Jan 2010
Oswald & Yap has been providing a full range of legal services to technology companies throughout southern California for over 15 years. The firm wanted to economize on the costs of its...
Provided by Hewlett-Packard (HP)
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Case Studies
HP Case Study: Peoples Bank (USA)
Jan 2010
Peoples Bank has grown to 50 branches across Ohio, West Virginia, and Kentucky and is adding up to five branch offices per year. Peoples Bank relied on non-integrated Avaya PBX systems that...
Provided by Hewlett-Packard (HP)
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Case Studies
HP Case Study: Maritime Steel (Canada)
Jan 2010
Maritime Steel and Foundries Limited fabricates steel and metals that support bridges around the world, including the Riverside Bridge in New York and Cape Breton's Margaree Harbor Bridge....
Provided by Hewlett-Packard (HP)
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Whitepapers
Brochure: Find, reach and collaborate with IBM Unified Communications and Collaboration solutions
Aug 2010
Enterprises have found that they can drive faster, better decisions and cut costs with a unified communications (UC) infrastructure. IBM Unified Communications and Collaboration (UC2) solutions...
Provided by IBM
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Case Studies
Service Provider Transforms Evidence Management in Law Enforcement
Oct 2009
TASER wanted to introduce innovative service to transform policing and digital multimedia evidence management and scale to manage exabytes of evidentiary data. The challenge was to protect...
Provided by Cisco Systems
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Case Studies
Retailer Prepares for the Future While Reducing Costs
May 2010
Slumberland, Inc. wanted to implement cost-effective data center server platform and support more servers without adding staff. The challenge was to decrease operational costs. Slumberland, Inc....
Provided by Cisco Systems
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Case Studies
Retailer Simplifies Management of Microsoft Environment
May 2010
Slumberland, Inc. wanted to decrease operational costs and efficiently manage Microsoft operating systems and applications. The challenge was to implement cost-effective data center server...
Provided by Cisco Systems
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Case Studies
Boca Raton Community Hospital Relies on Its Avaya Telecommunications Solution to Meet Critical Requirements for Patient Care Throughout a Sophisticated, Complex, and Multiple-Location Healthcare Facility
Feb 2009
Boca Raton Community Hospital was trying to support a world-class medical facility with an unreliable communications infrastructure that was reaching end of service. The hospital deployed an...
Provided by Avaya
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Case Studies
New Frameworks for Improving Service to Customers - Avaya Aura 6.0
Jul 2010
Birmingham, United Kingdom - Geomant is an enterprise solutions company focusing on delivering contact centre integration and unified communications solutions .As a provider of software and...
Provided by Avaya
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Case Studies
Securing the Unified Virtual Data Center With CA Technologies and Cisco Solutions
May 2010
Increased agility and massive cost efficiencies from scalable and elastic IT services delivered across the internet is fast becoming the new standard and the basis of business computing....
Provided by CA
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Case Studies
What Hurricane Ike Destroyed, YES Prep Restored With Unified Communications
Aug 2010
YES Prep Public Schools in Houston, Texas, was a great success story in the education of inner-city youth - and then Hurricane Ike levelled the district's schools and offices in a day. To rebuild...
Provided by Microsoft
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White Papers
IP User Mobility: A Unified Communications Profile and Portal, Wherever You Go
Dec 2008
The ability to transfer registration of an IP phone extension among local and remote devices - with portability of all associated features, preferences and privileges - can redefine the economics...
Provided by Toshiba
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White Papers
The Cost Advantages of Hosted Telephony
Aug 2010
With the growing number of IP telephony service and equipment options, there has never been a better time for enterprises to find a communications solution that fits their business needs. Top...
Provided by Infonetics Research
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Whitepapers
Providing Data Dissemination Services in the Future Internet
Oct 2008
In this paper authors examine benefits and motivations for the Information-Centric Networking (ICN) concept under the point of view of an Internet Service Provider (ISP). A proposal for a Global...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Protecting SIP-Based Networks and Services From Unwanted Communications
Oct 2008
In recent times, SIP-based communication systems have become more and more popular (e.g., in open networks, NGN, IMS, etc.,). With continuously dropping cost for the usage of such systems (e.g.,...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
WLAN IP Telephony Installation and Commissioning
Sep 2008
Employees carry wireless handsets to make and receive calls as they move throughout the building. The handsets are used only on the premises; they are not cellular phones. The handsets communicate...
Provided by Nortel Networks
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White Papers
VocalocityPBX: What SMBs Should Know About Deploying a Hosted PBX Phone Solution
Oct 2009
Hosted PBX phone solutions are revolutionizing how small and medium-sized businesses (SMBs) serve their customers, grow their business, and support their employees. Delivering the same...
Provided by vocalocity
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White Papers
T.38 and the Future of Fax
Jun 2001
One tool crucial to building the new world of real-time fax over IP is the emerging International Telecommunications Union (ITU) T.38 standard for real-time fax over IP, which makes it possible...
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White Papers
The Migration From TDM to IP: Getting the Ball Rolling
Jun 2009
Migrating from TDM to IP is a gradual evolution of the network. Due to age, wear and tear, enterprises will soon need to start replacing legacy equipment and networks. In addition, equipment...
Provided by Level 3 Communications
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Case Studies
Pro BTP - Develops Comprehensive Call Center Solution With IBM and Red Hat
Mar 2010
PRO BTP offers auto, home and life insurance, health services, leisure and social activities, and product savings for its three million members. PRO BTP needed to improve the quality of its call...
Provided by Red Hat
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Case Studies
SAP Business Communications Management Ensures Uninterrupted Customer Service
Dec 2007
Luottokunta's contact center comprises numerous teams as well as custom offerings for select customers such as banks. Trying to handle this complexity using the company's legacy telephony system...
Provided by SAP
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Case Studies
Full Transparency in the Municipality of Horsholm
Sep 2008
A reorganisation of the town hall in the Municipality of Horsholm, the municipality decided that the time was ripe for switching to IP telephony. The solution needed to link all the municipality's...
Provided by IBM
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Case Studies
Tilburg Answers Tomorrow's Communication Needs With an IBM and Nortel Solution
May 2010
Tilburg is the sixth largest city in the Netherlands. Faced with growing bandwidth needs, the City of Tilburg needed a reliable and scalable LAN to support all municipal data needs. The city also...
Provided by IBM
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White Papers
Customer Value Enhancement: Linking Strategy & Operations for Better Loyalty and Margins
Sep 2010
Read how rapid convergence of communications, media and entertainment (CME) is driving forward-thinking telecom, cable and content executives to seek more creative means to garner long-term...
Provided by SAP
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White Papers
Estimating Trunk Channel Requirements for VoIP Gateways in Unified Communications Deployments
Mar 2010
Unified Communications (UC) solutions typically use VoIP to deliver phone calls and are connected to the PSTN either through an IP PBX or via VoIP gateways, such as a Dialogic Media Gateway (DMG...
Provided by Dialogic
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White Papers
VoIP for the Technically Challenged
Apr 2008
Voice over Internet Protocol (VoIP) is not about "Smoke and Mirrors;" it's not "Hype." Voice over Internet Protocol is not about transporting voice communications over the Internet that would be...
Provided by Netlink Technologies
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White Papers
Voice Over Internet Protocol (VoIP) as a Communications Tool in South African Business
Feb 2009
Internationally many businesses have implemented Voice over Internet Protocol (VoIP) as an alternative to the traditional Plain Old Telephone System (POTS). The increased functionality of VoIP...
Provided by Academic Journals
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White Papers
ED-138 Network Requirements and Performances for Voice Over Internet Protocol (VoIP) Air Traffic Management (ATM) Systems
Apr 2009
For the purpose of supporting Voice over IP applications with performances similar to the classic telephony, the IP infrastructure must ensure smooth delivery of the voice and signaling packets to...
Provided by EUROCAE Communication sarl
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White Papers
Ethernet Over Copper (EoC): The New Gateway to Performance IP Service and a Better Performing Website
Jul 2010
Customer and partner expectations, the growing richness of content across the Internet, and the increasing use of business video conferencing, web-based video and VoIP are driving incredible...
Provided by Internap Network Services
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White Papers
The Regulation of Voice over IP (VoIP) in Europe
Mar 2008
Implementing access to emergency services is a challenge in view of the very different emergency systems2 across Europe. In particular, access to emergency services can be extremely difficult for...
Provided by WIK
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White Papers
Sagem-Interstar - Enabling IP Faxing in a VoIP Environment
May 2009
Sagem-Interstar, a Gold-level member in the Avaya DevConnect Program, provides the future-ready XMediusFAX boardless T.38 IP fax server for organizations that have deployed, or plan to deploy,...
Provided by Avaya
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White Papers
How Green is IP-Telephony?
Aug 2010
With constantly increasing costs of energy, authors ask themselves what they can say about the energy efficiency of existing VoIP systems. To answer that question, authors gather information about...
Provided by Association for Computing Machinery
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White Papers
Large Call Centers Migrating to Asterisk
Sep 2010
This white paper will focus on key considerations to be made when selecting and migrating to a new contact center technology platform, including "How to reduce substantial initial capital...
Provided by Indosoft
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White Papers
SIP Providers' Awareness of Media Connectivity
Jul 2011
Voice-over-IP (VoIP) has become an important service in the Internet. In contrast to the Public Switched Telephone Network where the delivery of all messages and streams is the responsibility of...
Provided by IARIA
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White Papers
An Analytic and Experimental Study on the Impact of Jitter Playout Buffer on the E-Model in VoIP Quality Measurement
Jul 2011
Over the years, the quality in Voice over IP (VoIP) applications has been defined from the perspective of VoIP service providers but not necessarily from the perspective of end-users....
Provided by IARIA
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White Papers
A SPIT Avoidance Workflow for SIP-Provider
Feb 2012
Voice-over-IP (VoIP) replaces traditional telephony network infrastructures in growing numbers. Along with this infrastructure change, SPam over Internet Telephony (SPIT) is likely to spread...
Provided by IARIA
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White Papers
A Holistic Approach to Open Source VoIP Security: Results From the EUX2010SEC Project
Jun 2010
The paper describes the approach and preliminary results from the research project EUX2010SEC. The project works closely with Voice over IP (VoIP) companies and users. The project aims at...
Provided by IARIA
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White Papers
The Digital Forensics of Portable Electronic Communication Devices Based on a Skype IM Session of a Pocket PC for NGC
Dec 2010
Portable electronic communication devices can be used for many purposes and they are capable of integrating with Ubiquitous Computing (UC) infrastructures to carry on mobile multimedia...
Provided by John Wiley & Sons
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White Papers
Efficient Architecture and Handoff Strategy Used for VoIP Sessions in SIP Based Wireless Networks
Dec 2010
In the near future, the Internet is likely to become an All-IP network that provides various multimedia services over wireless networks. Although the earliest VoIP applications did not consider...
Provided by Springer Science+Business Media
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White Papers
Dynamic Codec Selection Algorithm for VoIP
Jul 2011
This paper gives a proposal on algorithm for adaptive adjustment of VoIP sources transmission rate based on voice quality estimated at the receiver. This adjustment is achieved through the...
Provided by IARIA
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White Papers
Adaptive Congestion Detection and Control at the Application Level for VoIP
Jun 2010
For decades, researchers have worked extensively in the area of congestion control for packet-switched networks. Many proposed solutions take advantage of the congestion-control mechanism in...
Provided by IARIA
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White Papers
Dynamic Adaptation of Quality of Service for VoIP Communications
Jun 2010
This paper proposes an adaptive solution to provide quality of service in Voice over IP communications. This solution is based on three components that interact in order to achieve higher quality...
Provided by IARIA
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White Papers
Call Admission Control Dimensioning for VoIP Traffic Over Wireless Access Networks: From Network to Application-Specific Perspective
Apr 2011
Admission control is a key issue for Quality of Service (QoS) provisioning in both wired and wireless communication networks. Providing QoS for voice traffic transmission over packet-based network...
Provided by IARIA
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White Papers
Bandwidth Allocation Algorithms for VOIP Networks: An Experimentation System and Evaluation of Created Algorithm
Jul 2011
In this paper, the authors present how to allocate bandwidth in VoIP networks, how to set up a connection, and which links in the network should be used. Common are algorithms which find Shortest...
Provided by IARIA
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White Papers
Secure Communication Using Electronic Identity Cards for Voice over IP Communication, Home Energy Management, and eMobility
Apr 2012
Using communication services is a common part of everyday life in a personal or business context. Communication services include Internet services like voice services, chat service, and web 2.0...
Provided by IARIA
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White Papers
An OPNET-Based Simulation Approach for Deploying VoIP
Jan 2008
These days a massive deployment of VoIP is taking place over IP networks. VoIP deployment is a challenging task for network researchers and engineers. This paper presents a detailed simulation...
Provided by King Fahd University of Petroleum & Minerals
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White Papers
A Taxonomy of Cross Layer Routing Metrics for Wireless Mesh Networks
May 2012
Multi-hop, multi-channel, and multi-radio Wireless Mesh Networks (WMNs) are emerging as promising field of wireless technology with self-organizing and self-healing features for internet and real...
Provided by Springer Science+Business Media
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White Papers
An Efficient MAC Scheme With Modified RTS/CTS of IEEE P1901
Jan 2011
According to multimedia service distribution such as High-Definition TeleVision (HDTV), Internet Protocol TeleVision (IPTV) and Voice Over Internet Protocol (VoIP), the networks are required to...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
Utilizing Bloom Filters for Detecting Flooding Attacks Against SIP Based Services
Apr 2009
Any application or service utilizing the Internet is exposed to both general Internet attacks and other specific ones. Most of the times the latter are exploiting a vulnerability or...
Provided by Reed Elsevier
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White Papers
A Lightweight Protection Mechanism Against Signaling Attacks in a SIP-Based VoIP Environment
Feb 2008
The advent of Voice over IP (VoIP) has offered numerous advantages but, at the same time, it has introduced security threats not previously encountered in networks with a closed architecture like...
Provided by Springer Science+Business Media
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White Papers
Order Statistics for Voice Activity Detection in VoIP
Jun 2010
Real-time voice communication over the Internet has rapidly gained popularity. It is indeed essential to reduce the total bandwidth consumption to efficiently use the available bandwidth for the...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Perceptual Evaluation of Playout Buffer Algorithm for Enhancing Perceived Quality of Voice Transmission Over IP Network
Apr 2012
Voice over Internet Protocol (VoIP) is a technology that allows you to make voice calls using a broadband Internet connection instead of a regular (or analog) phone line. Voice over Internet...
Provided by Academy & Industry Research Collaboration Center
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White Papers
JMEE: A Scalable Framework for JTRS Waveform Modeling & Evaluation
Sep 2008
In this paper, the authors present the architecture of a Scalable JTRS Modeling and Evaluation Environment (Scalable JMEE), which uses hardware-in-the-loop with real-time emulation to support a...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Distributed Adaptive Diverse Routing for Voice-Over-IP in Service Overlay Networks
Nov 2009
This paper proposes a novel mechanism to discover delay-optimal diverse paths using distributed learning automata for Voice-over-IP (VoIP) routing in service overlay networks. In addition, a novel...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Voip Call Optimization in Diverse Network Scenarios Using Learning Based State-Space Search Technique
Oct 2011
A VoIP based call has stringent QoS requirements with respect to delay, jitter, loss, MOS and R-Factor. Various QoS mechanisms implemented to satisfy these requirements must be adaptive under...
Provided by Academy & Industry Research Collaboration Center
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White Papers
Privacy Preserving of VoIP Against Peer-to-Peer Network Attacks and Defense
Mar 2012
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 gopalax softwares
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White Papers
Efficient Detection of VoIP Calls Hidden in Web Traffic
Mar 2011
Network managers face nowadays a challenging problem to detect traffic from Skype. Skype can operate behind many firewalls and network proxies without user configuration. Behind restrictive...
Provided by University College of Engineering
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White Papers
Assessing the Risk of Intercepting VoIP Calls
May 2008
This paper has discussed the problem of assessing the risk of the interception of a VoIP phone call in the Internet with the aim of confuting the usual marketing promise of offering a 'Cost-free'...
Provided by Association for Computing Machinery
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White Papers
Analysis of Skype VoIP Traffic in UMTS: End-to-End QoS and QoE Measurements
Nov 2007
In the future Internet, multi-network services will follow a new paradigm in which the intelligence of the network control is gradually moved to the edge of the network. This impacts both the...
Provided by Reed Elsevier
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Whitepapers
Optimize availability and performance of your 4G Network
Apr 2012
Communication service providers (CSPs) are experiencing an unprecedented demand for increased network capacity and performance. By leveraging IBM® Tivoli® Netcool® products, CSPs can avoid...
Provided by IBM
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White Papers
Deadline-Based Scheduling in Support of Real-Time Data Delivery
Oct 2007
Many applications running on the Internet require timely delivery of real-time data. Examples of real-time data include stock quote updates and stock trades in on-line trading, bids in an on-line...
Provided by Reed Elsevier
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White Papers
Quality Assessment of Interactive Voice Applications
Jan 2008
The conversational quality of a VoIP communication is dependent on several factors such as the coding process used, the network conditions and the type of error correction or concealment employed....
Provided by Reed Elsevier
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White Papers
Performance Evaluation of Delay-Sensitive Services Over the Internet Using Multipath Routing
Feb 2012
In recent years, there has been a phenomenal growth in the commercial deployment of delay-sensitive services, such as voice and video services, over the Internet Protocol. Regardless of the...
Provided by The Second International Conference on Communications and Information Technology
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White Papers
Evaluation of VoIP Quality Over WiBro
Jan 2008
In this paper, the authors have conducted experiments to evaluate QoS of VoIP applications over the WiBro network. In order to capture the baseline performance of the WiBro network they measure...
Provided by Chungnam National University
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White Papers
On the Billing Vulnerabilities of SIP-Based VoIP Systems
Feb 2010
For commercial VoIP services, billing is crucial to both service providers and their subscribers. One of the most basic requirements of any billing function is that it must be accurate and...
Provided by Reed Elsevier
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Webcasts
Aetna Success Story for SOA and DataPower
Apr 2012
Heathcare insurance provider Aetna uses IBM WebSphere DataPower appliances every day, processing more than eight million production requests daily. In this presentation you will learn how...
Provided by IBM
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White Papers
Multipath Routing With Adaptive Playback Scheduling for Voice Over IP in Service Overlay Networks
Apr 2008
Voice over IP (VoIP) quality of service provision over the best effort Internet remains a challenging task since an interactive level conversation has strict delay, loss and delay jitter...
Provided by McGill University
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White Papers
Synthesis of Network Delays for Voice Packets in Service Overlay Networks
Aug 2009
Toll quality Voice-over-IP (VoIP) provision over Service Overlay Networks (SONs) is still a big challenge for the current best-effort Internet. The end to end network delay, as one of the most...
Provided by Association for Computing Machinery
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White Papers
Estimation and Simulation of Network Delay Traces for VoIP in Service Overlay Network
Aug 2007
The network delay is one of the most important impairments for VoIP (Voice Over IP). This paper focuses on the bi-objective optimization problem of minimizing sampling cost and also minimizing the...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Characteristic Analysis of VOIP Traffic for Wireless Network
Mar 2010
A traditional Voice over Internet Protocol (VoIP) technique is based on client/server architecture. In this paper, the authors present VoIP architecture for Ad-hoc network based on H.323 Standard...
Provided by RIMT - Institute of Engineering & Technology
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White Papers
A Garch-Based Adaptive Playout Delay Algorithm for VoIP
Jun 2010
Network delay, packet loss and network delay variability (jitter) are important factors that impact on perceived voice quality in VoIP networks. An adaptive playout buffer is used in a VoIP...
Provided by Reed Elsevier
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Whitepapers
Nemertes Research PilotHouse Awards: Servers for Virtualization
Apr 2012
The Nemertes Research PilotHouse Awards provide insight on the performance of technology vendors, according to feedback from IT decision makers who use their products or services. See which...
Provided by Hewlett-Packard & Intel®
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White Papers
Controlling Applications by Managing Network Characteristics
Feb 2012
Edge network operators have limited tools to control activities on their networks. This paper examines network dissuasion, a new approach to edge network control, based on controlling the...
Provided by University of California
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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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Tools & Templates
Cisco TelePresence Calculator: Save Money and Reduce Your Carbon Imprint
Sep 2010
Learn how TelePresence can help pay for itself, while lowering greenhouse gas. Use this calculator to answer these two questions: How much greenhouse gas can Cisco TelePresence help me avoid?How...
Provided by TANDBERG, now part of Cisco
