APTA TransiTech Conference Communications: Vendor Perspective (TT) Phoenix, Arizona, Tuesday, VoIP Solution (101)

Size: px
Start display at page:

Download "APTA TransiTech Conference Communications: Vendor Perspective (TT) Phoenix, Arizona, Tuesday, 3.19.13. VoIP Solution (101)"

Transcription

1 APTA TransiTech Conference Communications: Vendor Perspective (TT) Phoenix, Arizona, Tuesday, VoIP Solution (101)

2 Agenda Items Introduction What is VoIP? Codecs Mean opinion score (MOS) Bandwidth Considerations VoIP (SIP) Connection Model Latency Jitter Buffer & Packet Loss Recovery Why is this technology important?

3 Clever Devices Leading provider of digital information systems, Intelligent Transportation Systems (ITS) solutions and Smart Bus systems In 2012, acquired two ITS firms: Digital Recorders and GreyHawk Technologies Clients include the largest transit operations in North America: Washington DC New York City Transit Chicago Transit Authority New Jersey Transit Ottawa, Canada Panama City, Panama Largest Real-Time Bus Arrival Information (BusTime) system in North America NY Headquarters plus four regional offices Approximately 400 employees

4 What is VoIP Voice over Internet Protocol (VoIP) commonly refers to the communication protocols, technologies, methodologies, and transmission techniques involved in the delivery of voice communications over Internet Protocol (IP) networks, such as the Internet. wikipedia.org

5 Overview In all VoIP systems, your voice is converted into packets of data and then transmitted to the recipient over the Internet and decoded back into your voice at the other end. To make it quicker, these packets are compressed before transmission with a codec (almost like zipping a file on the fly). There are many codecs using different compression methods and bitrates, thus each codec has its own bandwidth requirements and provides different voice quality.

6 Interoperability Mainstream VoIP solutions utilize the SIP (Session Initiation Protocol) which handles the negotiation of sessions The de-facto standard Most SIP compatible devices can talk to any other SIP enabled device The intermediate proxy server will generally resolve any codec issues

7 Popular Alternatives There are many alternate VoIP based systems. Using voice chat in MSN, Google, Yahoo or Skype could be regarded as VoIP, but these are all proprietary systems. Talking to someone using any of these alternatives requires both ends of the call to have the same software installed. These alternate systems use a restricted solution that s not open and offers limited-to-no connectivity beyond their respective networks without incurring additional fees.

8 A codec is a device or computer program capable of encoding / decoding a digital data stream or signal. Codec

9 Mean opinion score (MOS) Mean opinion score (MOS) is a test that has been used for decades in telephony networks to obtain the human user's view of the quality of the network. VoIP Private Radio

10 Bandwidth Bandwidth - the rate of data transfer, bit rate or throughput, measured in bits per second (bps), sometimes referred to as the width of the pipe.

11 Putting it together Inter operability Call quality Network requirements

12 Putting it together (cont.)

13 Which Codec to choose? It becomes quickly evident from the large number of parameters, that there is no perfect codec it s all about balancing your specific requirements and application Audio bandwidth (higher is better) Data rate or bit rate (how many bits per second, fewer is better) Audio quality loss (how much does it degrade the audio, lower is better) Kind of audio (does it only work with speech, or with anything?) Processing power required (less is better) Processor memory required (less is better) Openly available to vendors? ( yes is essential) Inserted delay (audio latency caused by the algorithm, less is better) Resilience (how insensitive to corrupted or lost packets, more is better) ITU standards-based (standardized by the International Telecommunications Union - yes is better)

14 VoIP (SIP) Connection Model User A Proxy User B Call establishment process - session negotiation with a proxy server

15 Latency (and Bandwidth) Latency is the time delay from when you say a word until the other person hears it Sometimes referred to as the "mouth-to-ear" delay. If you think of the Internet as a series of pipes Latency is the length of the pipe between two points Bandwidth represents the width of the pipe The wider the pipe the more data you can send in parallel The key concept - regardless of how much data you are sending, it still has to move the entire distance from point A to point B Moving data takes time; which is called latency

16 Jitter and Packet Loss Jitter is the measure of variability in arrival times between packets. When a packet does not arrive in time to fit into the active voice stream, it has to be discarded. If this happens too often, the listener will perceive reduced voice quality. VoIP utilizes the UDP transport layer [in most situations], which does not provide guaranteed packet delivery (i.e., packets will be lost).

17 Jitter Buffer A temporarily storage area for arriving packets, used as a means of minimizing delay variations. Impact - If the buffer is too small then an excessive number of packets may be discarded, which can lead to call quality degradation. Resolution - Typical range of milliseconds. Adaptive buffers may be set to several 100 s of milliseconds.

18 Packet Loss Recovery A strategy of hiding packet loss errors from the listener Typical approach (Packet Loss Concealment) Lost packets are handled by the receiving device General methods Silence insertion Noise substitution Packet repetition

19 Summary - Why is this technology important Low cost Flexible No major capital investment needed No special licensing or rebanding required (FCC) Vendor independence Improved call quality and geographical range Bidirectional communication

20 Summary - Why is this technology important (cont.) No transmit timer issues (i.e., over heating) Leverage technological improvements and updates over time If you already have a CAD System Then you probably already have many real-time issues to consider; the additional bandwidth requirements of a VoIP call are minimal Public WiFi, video, vehicle monitoring, credit card payment system, etc. No need to rationalize true channel capacity Theoretical capacity models like Erlang C are unneeded No call queuing issues - the total number of available channels is almost unlimited, in real-time! True dynamic talk group capability

21 Thank You Dean Soucy Senior Vice President of Engineering Clever Devices [Mobile] [Office Direct Dial]

The Fax on IP Networks. White Paper February 2011

The Fax on IP Networks. White Paper February 2011 The Fax on IP Networks White Paper February 2011 2 The Fax on IP Networks Contents Overview... 3 Group 3 Fax Technology... 4 G.711 Fax Pass-Through... 5 T.38 IP Fax Relay... 6 Network Design Considerations...

More information

An Introduction to VoIP Protocols

An Introduction to VoIP Protocols An Introduction to VoIP Protocols www.netqos.com Voice over IP (VoIP) offers the vision of a converged network carrying multiple types of traffic (voice, video, and data, to name a few). To carry out this

More information

Curso de Telefonía IP para el MTC. Sesión 2 Requerimientos principales. Mg. Antonio Ocampo Zúñiga

Curso de Telefonía IP para el MTC. Sesión 2 Requerimientos principales. Mg. Antonio Ocampo Zúñiga Curso de Telefonía IP para el MTC Sesión 2 Requerimientos principales Mg. Antonio Ocampo Zúñiga Factors Affecting Audio Clarity Fidelity: Audio accuracy or quality Echo: Usually due to impedance mismatch

More information

Receiving the IP packets Decoding of the packets Digital-to-analog conversion which reproduces the original voice stream

Receiving the IP packets Decoding of the packets Digital-to-analog conversion which reproduces the original voice stream Article VoIP Introduction Internet telephony refers to communications services voice, fax, SMS, and/or voice-messaging applications that are transported via the internet, rather than the public switched

More information

Requirements of Voice in an IP Internetwork

Requirements of Voice in an IP Internetwork Requirements of Voice in an IP Internetwork Real-Time Voice in a Best-Effort IP Internetwork This topic lists problems associated with implementation of real-time voice traffic in a best-effort IP internetwork.

More information

SIP Trunking and Voice over IP

SIP Trunking and Voice over IP SIP Trunking and Voice over IP Agenda What is SIP Trunking? SIP Signaling How is Voice encoded and transported? What are the Voice over IP Impairments? How is Voice Quality measured? VoIP Technology Confidential

More information

ANALYSIS OF LONG DISTANCE 3-WAY CONFERENCE CALLING WITH VOIP

ANALYSIS OF LONG DISTANCE 3-WAY CONFERENCE CALLING WITH VOIP ENSC 427: Communication Networks ANALYSIS OF LONG DISTANCE 3-WAY CONFERENCE CALLING WITH VOIP Spring 2010 Final Project Group #6: Gurpal Singh Sandhu Sasan Naderi Claret Ramos (gss7@sfu.ca) (sna14@sfu.ca)

More information

Voice Over IP Per Call Bandwidth Consumption

Voice Over IP Per Call Bandwidth Consumption Over IP Per Call Bandwidth Consumption Interactive: This document offers customized voice bandwidth calculations with the TAC Bandwidth Calculator ( registered customers only) tool. Introduction Before

More information

Application Notes. Introduction. Contents. Managing IP Centrex & Hosted PBX Services. Series. VoIP Performance Management. Overview.

Application Notes. Introduction. Contents. Managing IP Centrex & Hosted PBX Services. Series. VoIP Performance Management. Overview. Title Series Managing IP Centrex & Hosted PBX Services Date July 2004 VoIP Performance Management Contents Introduction... 1 Quality Management & IP Centrex Service... 2 The New VoIP Performance Management

More information

Online course syllabus. MAB: Voice over IP

Online course syllabus. MAB: Voice over IP Illuminating Technology Course aim: Online course syllabus MAB: Voice over IP This course introduces the principles and operation of telephony services that operate over Internet Protocol (IP) networks

More information

Quality of Service Testing in the VoIP Environment

Quality of Service Testing in the VoIP Environment Whitepaper Quality of Service Testing in the VoIP Environment Carrying voice traffic over the Internet rather than the traditional public telephone network has revolutionized communications. Initially,

More information

Goal We want to know. Introduction. What is VoIP? Carrier Grade VoIP. What is Meant by Carrier-Grade? What is Meant by VoIP? Why VoIP?

Goal We want to know. Introduction. What is VoIP? Carrier Grade VoIP. What is Meant by Carrier-Grade? What is Meant by VoIP? Why VoIP? Goal We want to know Introduction What is Meant by Carrier-Grade? What is Meant by VoIP? Why VoIP? VoIP Challenges 2 Carrier Grade VoIP Carrier grade Extremely high availability 99.999% reliability (high

More information

Voice over IP. Overview. What is VoIP and how it works. Reduction of voice quality. Quality of Service for VoIP

Voice over IP. Overview. What is VoIP and how it works. Reduction of voice quality. Quality of Service for VoIP Voice over IP Andreas Mettis University of Cyprus November 23, 2004 Overview What is VoIP and how it works. Reduction of voice quality. Quality of Service for VoIP 1 VoIP VoIP (voice over IP - that is,

More information

Understanding Latency in IP Telephony

Understanding Latency in IP Telephony Understanding Latency in IP Telephony By Alan Percy, Senior Sales Engineer Brooktrout Technology, Inc. 410 First Avenue Needham, MA 02494 Phone: (781) 449-4100 Fax: (781) 449-9009 Internet: www.brooktrout.com

More information

VoIP Technologies Lecturer : Dr. Ala Khalifeh Lecture 4 : Voice codecs (Cont.)

VoIP Technologies Lecturer : Dr. Ala Khalifeh Lecture 4 : Voice codecs (Cont.) VoIP Technologies Lecturer : Dr. Ala Khalifeh Lecture 4 : Voice codecs (Cont.) 1 Remember first the big picture VoIP network architecture and some terminologies Voice coders 2 Audio and voice quality measuring

More information

Indepth Voice over IP and SIP Networking Course

Indepth Voice over IP and SIP Networking Course Introduction SIP is fast becoming the Voice over IP protocol of choice. During this 3-day course delegates will examine SIP technology and architecture and learn how a functioning VoIP service can be established.

More information

Voice over IP (VoIP) Overview. Introduction. David Feiner ACN 2004. Introduction VoIP & QoS H.323 SIP Comparison of H.323 and SIP Examples

Voice over IP (VoIP) Overview. Introduction. David Feiner ACN 2004. Introduction VoIP & QoS H.323 SIP Comparison of H.323 and SIP Examples Voice over IP (VoIP) David Feiner ACN 2004 Overview Introduction VoIP & QoS H.323 SIP Comparison of H.323 and SIP Examples Introduction Voice Calls are transmitted over Packet Switched Network instead

More information

Broadband Networks. Prof. Dr. Abhay Karandikar. Electrical Engineering Department. Indian Institute of Technology, Bombay. Lecture - 29.

Broadband Networks. Prof. Dr. Abhay Karandikar. Electrical Engineering Department. Indian Institute of Technology, Bombay. Lecture - 29. Broadband Networks Prof. Dr. Abhay Karandikar Electrical Engineering Department Indian Institute of Technology, Bombay Lecture - 29 Voice over IP So, today we will discuss about voice over IP and internet

More information

VoIP QoS. Version 1.0. September 4, 2006. AdvancedVoIP.com. sales@advancedvoip.com support@advancedvoip.com. Phone: +1 213 341 1431

VoIP QoS. Version 1.0. September 4, 2006. AdvancedVoIP.com. sales@advancedvoip.com support@advancedvoip.com. Phone: +1 213 341 1431 VoIP QoS Version 1.0 September 4, 2006 AdvancedVoIP.com sales@advancedvoip.com support@advancedvoip.com Phone: +1 213 341 1431 Copyright AdvancedVoIP.com, 1999-2006. All Rights Reserved. No part of this

More information

Basic principles of Voice over IP

Basic principles of Voice over IP Basic principles of Voice over IP Dr. Peter Počta {pocta@fel.uniza.sk} Department of Telecommunications and Multimedia Faculty of Electrical Engineering University of Žilina, Slovakia Outline VoIP Transmission

More information

Comparison of Voice over IP with circuit switching techniques

Comparison of Voice over IP with circuit switching techniques Comparison of Voice over IP with circuit switching techniques Author Richard Sinden Richard Sinden 1 of 9 Abstract Voice-over-IP is a growing technology. Companies are beginning to consider commercial

More information

icall VoIP (User Agent) Configuration

icall VoIP (User Agent) Configuration icall VoIP (User Agent) Configuration 1 General 1.1 Topic General Document summarizing the general requirements for the configuration of VoIP hardware and / or software to utilize the icall service. 1.2

More information

QOS Requirements and Service Level Agreements. LECTURE 4 Lecturer: Associate Professor A.S. Eremenko

QOS Requirements and Service Level Agreements. LECTURE 4 Lecturer: Associate Professor A.S. Eremenko QOS Requirements and Service Level Agreements LECTURE 4 Lecturer: Associate Professor A.S. Eremenko Application SLA Requirements Different applications have different SLA requirements; the impact that

More information

QoS in VoIP. Rahul Singhai Parijat Garg

QoS in VoIP. Rahul Singhai Parijat Garg QoS in VoIP Rahul Singhai Parijat Garg Outline Introduction The VoIP Setting QoS Issues Service Models Techniques for QoS Voice Quality Monitoring Sample solution from industry Conclusion Introduction

More information

VoIP / SIP Planning and Disclosure

VoIP / SIP Planning and Disclosure VoIP / SIP Planning and Disclosure Voice over internet protocol (VoIP) and session initiation protocol (SIP) technologies are the telecommunication industry s leading commodity due to its cost savings

More information

Chapter 3 ATM and Multimedia Traffic

Chapter 3 ATM and Multimedia Traffic In the middle of the 1980, the telecommunications world started the design of a network technology that could act as a great unifier to support all digital services, including low-speed telephony and very

More information

TIME-SAVING VOIP FEATURES YOUR BUSINESS NEEDS

TIME-SAVING VOIP FEATURES YOUR BUSINESS NEEDS TIME-SAVING VOIP FEATURES YOUR BUSINESS NEEDS For America's growing small businesses, the solutions offered by a VoIP phone system are worth taking noting. VoIP is widely recognized for the tremendous

More information

Voice-Over-IP. Daniel Zappala. CS 460 Computer Networking Brigham Young University

Voice-Over-IP. Daniel Zappala. CS 460 Computer Networking Brigham Young University Voice-Over-IP Daniel Zappala CS 460 Computer Networking Brigham Young University Coping with Best-Effort Service 2/23 sample application send a 160 byte UDP packet every 20ms packet carries a voice sample

More information

QoS issues in Voice over IP

QoS issues in Voice over IP COMP9333 Advance Computer Networks Mini Conference QoS issues in Voice over IP Student ID: 3058224 Student ID: 3043237 Student ID: 3036281 Student ID: 3025715 QoS issues in Voice over IP Abstract: This

More information

Clearing the Way for VoIP

Clearing the Way for VoIP Gen2 Ventures White Paper Clearing the Way for VoIP An Alternative to Expensive WAN Upgrades Executive Overview Enterprises have traditionally maintained separate networks for their voice and data traffic.

More information

Simulative Investigation of QoS parameters for VoIP over WiMAX networks

Simulative Investigation of QoS parameters for VoIP over WiMAX networks www.ijcsi.org 288 Simulative Investigation of QoS parameters for VoIP over WiMAX networks Priyanka 1, Jyoteesh Malhotra 2, Kuldeep Sharma 3 1,3 Department of Electronics, Ramgarhia Institue of Engineering

More information

Network administrators must be aware that delay exists, and then design their network to bring end-to-end delay within acceptable limits.

Network administrators must be aware that delay exists, and then design their network to bring end-to-end delay within acceptable limits. Delay Need for a Delay Budget The end-to-end delay in a VoIP network is known as the delay budget. Network administrators must design a network to operate within an acceptable delay budget. This topic

More information

12 Quality of Service (QoS)

12 Quality of Service (QoS) Burapha University ก Department of Computer Science 12 Quality of Service (QoS) Quality of Service Best Effort, Integrated Service, Differentiated Service Factors that affect the QoS Ver. 0.1 :, prajaks@buu.ac.th

More information

TECHNICAL CHALLENGES OF VoIP BYPASS

TECHNICAL CHALLENGES OF VoIP BYPASS TECHNICAL CHALLENGES OF VoIP BYPASS Presented by Monica Cultrera VP Software Development Bitek International Inc 23 rd TELELCOMMUNICATION CONFERENCE Agenda 1. Defining VoIP What is VoIP? How to establish

More information

PERFORMANCE ANALYSIS OF VOIP TRAFFIC OVER INTEGRATING WIRELESS LAN AND WAN USING DIFFERENT CODECS

PERFORMANCE ANALYSIS OF VOIP TRAFFIC OVER INTEGRATING WIRELESS LAN AND WAN USING DIFFERENT CODECS PERFORMANCE ANALYSIS OF VOIP TRAFFIC OVER INTEGRATING WIRELESS LAN AND WAN USING DIFFERENT CODECS Ali M. Alsahlany 1 1 Department of Communication Engineering, Al-Najaf Technical College, Foundation of

More information

Analysis of QoS parameters of VOIP calls over Wireless Local Area Networks

Analysis of QoS parameters of VOIP calls over Wireless Local Area Networks Analysis of QoS parameters of VOIP calls over Wireless Local Area Networks Ayman Wazwaz, Computer Engineering Department, Palestine Polytechnic University, Hebron, Palestine, aymanw@ppu.edu Duaa sweity

More information

Evaluating Data Networks for Voice Readiness

Evaluating Data Networks for Voice Readiness Evaluating Data Networks for Voice Readiness by John Q. Walker and Jeff Hicks NetIQ Corporation Contents Introduction... 2 Determining Readiness... 2 Follow-on Steps... 7 Summary... 7 Our focus is on organizations

More information

Software Engineering 4C03 VoIP: The Next Telecommunication Frontier

Software Engineering 4C03 VoIP: The Next Telecommunication Frontier Software Engineering 4C03 VoIP: The Next Telecommunication Frontier Rudy Muslim 0057347 McMaster University Computing and Software Department Hamilton, Ontario Canada Introduction Voice over Internet Protocol

More information

An Analysis of Error Handling Techniques in Voice over IP

An Analysis of Error Handling Techniques in Voice over IP An Analysis of Error Handling Techniques in Voice over IP Martin John Lipka ABSTRACT The use of Voice over IP (VoIP) has been growing in popularity, but unlike its wired circuit-switched telephone network

More information

Service resiliency and reliability Quality of Experience Modelling requirements A PlanetLab proposal. PDCAT'08 - Dunedin December 1-4, 2008

Service resiliency and reliability Quality of Experience Modelling requirements A PlanetLab proposal. PDCAT'08 - Dunedin December 1-4, 2008 PlaNetLab Options from Massey University Richard Harris Presentation Outline Service resiliency and reliability Quality of Experience Modelling requirements A PlanetLab proposal PDCAT'2008 Dunedin 2 (c)

More information

Implementation of Video Voice over IP in Local Area Network Campus Environment

Implementation of Video Voice over IP in Local Area Network Campus Environment Implementation of Video Voice over IP in Local Area Network Campus Environment Mohd Nazri Ismail Abstract--In this research, we propose an architectural solution to integrate the video voice over IP (V2oIP)

More information

Voice over IP Basics for IT Technicians

Voice over IP Basics for IT Technicians Voice over IP Basics for IT Technicians White Paper Executive summary The IP phone is coming or has arrived on desk near you. The IP phone is not a PC, but does have a number of hardware and software elements

More information

Dovid Coplon, Product Management Director http://gipscorp.com

Dovid Coplon, Product Management Director http://gipscorp.com Dovid Coplon, Product Management Director http://gipscorp.com VoIP Quality Mobile VoIP & Technology Trends Greater accessibility and affordability Network operators are introducing new pricing models Handset

More information

Mobile VoIP Audio Quality CRASH COURSE THE INS AND OUTS OF MOBILE VOIP

Mobile VoIP Audio Quality CRASH COURSE THE INS AND OUTS OF MOBILE VOIP CRASH COURSE THE INS AND OUTS OF MOBILE VOIP CRASH COURSE: TABLE OF CONTENTS THE INS AND OUTS OF MOBILE VoIP About VoIP...1 History of VoIP...1 Mobile VoIP......2 WebRTC......3 VoIP Sound......4 Latency

More information

WhitePaper: XipLink Real-Time Optimizations

WhitePaper: XipLink Real-Time Optimizations WhitePaper: XipLink Real-Time Optimizations XipLink Real Time Optimizations Header Compression, Packet Coalescing and Packet Prioritization Overview XipLink Real Time ( XRT ) is a new optimization capability

More information

Unit 23. RTP, VoIP. Shyam Parekh

Unit 23. RTP, VoIP. Shyam Parekh Unit 23 RTP, VoIP Shyam Parekh Contents: Real-time Transport Protocol (RTP) Purpose Protocol Stack RTP Header Real-time Transport Control Protocol (RTCP) Voice over IP (VoIP) Motivation H.323 SIP VoIP

More information

VoIP 101. E911-Enhanced 911- Used for providing emergency service on cellular and internet voice calls.

VoIP 101. E911-Enhanced 911- Used for providing emergency service on cellular and internet voice calls. If you ve been researching phone systems for awhile, you ve probably heard the term VoIP. What s the definition? Do you need certain hardware for it to work? There are a few questions that should be answered

More information

Performance Evaluation of AODV, OLSR Routing Protocol in VOIP Over Ad Hoc

Performance Evaluation of AODV, OLSR Routing Protocol in VOIP Over Ad Hoc (International Journal of Computer Science & Management Studies) Vol. 17, Issue 01 Performance Evaluation of AODV, OLSR Routing Protocol in VOIP Over Ad Hoc Dr. Khalid Hamid Bilal Khartoum, Sudan dr.khalidbilal@hotmail.com

More information

VOICE OVER IP AND NETWORK CONVERGENCE

VOICE OVER IP AND NETWORK CONVERGENCE POZNAN UNIVE RSITY OF TE CHNOLOGY ACADE MIC JOURNALS No 80 Electrical Engineering 2014 Assaid O. SHAROUN* VOICE OVER IP AND NETWORK CONVERGENCE As the IP network was primarily designed to carry data, it

More information

Combining Voice over IP with Policy-Based Quality of Service

Combining Voice over IP with Policy-Based Quality of Service TechBrief Extreme Networks Introduction Combining Voice over IP with Policy-Based Quality of Service Businesses have traditionally maintained separate voice and data networks. A key reason for this is

More information

VoIP Analysis Fundamentals with Wireshark. Phill Shade (Forensic Engineer Merlion s Keep Consulting)

VoIP Analysis Fundamentals with Wireshark. Phill Shade (Forensic Engineer Merlion s Keep Consulting) VoIP Analysis Fundamentals with Wireshark Phill Shade (Forensic Engineer Merlion s Keep Consulting) 1 Phillip D. Shade (Phill) phill.shade@gmail.com Phillip D. Shade is the founder of Merlion s Keep Consulting,

More information

Active Monitoring of Voice over IP Services with Malden

Active Monitoring of Voice over IP Services with Malden Active Monitoring of Voice over IP Services with Malden Introduction Active Monitoring describes the process of evaluating telecommunications system performance with intrusive tests. It differs from passive

More information

Voice over IP Protocols And Compression Algorithms

Voice over IP Protocols And Compression Algorithms University of Tehran Electrical and Computer Engineering School SI Lab. Weekly Presentations Voice over IP Protocols And Compression Algorithms Presented by: Neda Kazemian Amiri Agenda Introduction to

More information

Network Simulation Traffic, Paths and Impairment

Network Simulation Traffic, Paths and Impairment Network Simulation Traffic, Paths and Impairment Summary Network simulation software and hardware appliances can emulate networks and network hardware. Wide Area Network (WAN) emulation, by simulating

More information

Voice over Internet Protocol (VoIP) systems can be built up in numerous forms and these systems include mobile units, conferencing units and

Voice over Internet Protocol (VoIP) systems can be built up in numerous forms and these systems include mobile units, conferencing units and 1.1 Background Voice over Internet Protocol (VoIP) is a technology that allows users to make telephone calls using a broadband Internet connection instead of an analog phone line. VoIP holds great promise

More information

Project Code: SPBX. Project Advisor : Aftab Alam. Project Team: Umair Ashraf 03-1853 (Team Lead) Imran Bashir 02-1658 Khadija Akram 04-0080

Project Code: SPBX. Project Advisor : Aftab Alam. Project Team: Umair Ashraf 03-1853 (Team Lead) Imran Bashir 02-1658 Khadija Akram 04-0080 Test Cases Document VOIP SOFT PBX Project Code: SPBX Project Advisor : Aftab Alam Project Team: Umair Ashraf 03-1853 (Team Lead) Imran Bashir 02-1658 Khadija Akram 04-0080 Submission Date:23-11-2007 SPBX

More information

Performance Evaluation of VoIP Services using Different CODECs over a UMTS Network

Performance Evaluation of VoIP Services using Different CODECs over a UMTS Network Performance Evaluation of VoIP Services using Different CODECs over a UMTS Network Jianguo Cao School of Electrical and Computer Engineering RMIT University Melbourne, VIC 3000 Australia Email: j.cao@student.rmit.edu.au

More information

Troubleshooting Common Issues in VoIP

Troubleshooting Common Issues in VoIP Troubleshooting Common Issues in VoIP 2014, SolarWinds Worldwide, LLC. All rights reserved. Voice over Internet Protocol (VoIP) Introduction Voice over IP, or VoIP, refers to the delivery of voice and

More information

Re-establishing and improving the experimental VoIP link with the University of Namibia: A Case Study

Re-establishing and improving the experimental VoIP link with the University of Namibia: A Case Study Re-establishing and improving the experimental VoIP link with the University of Namibia: A Case Study R. M. Ngandu, A. Terzoli & M. Tsietsi Department of Computer Science, Rhodes University September,

More information

VoIP Glossary. Client (Softphone client): The software installed in the userâ s computer to make calls over the Internet.

VoIP Glossary. Client (Softphone client): The software installed in the userâ s computer to make calls over the Internet. VoIP Glossary Analog audio signals: Analog audio signals are used to transmit voice data over telephone lines. This is done by varying or modulating the frequency of sound waves to accurately reflect the

More information

Encapsulating Voice in IP Packets

Encapsulating Voice in IP Packets Encapsulating Voice in IP Packets Major VoIP Protocols This topic defines the major VoIP protocols and matches them with the seven layers of the OSI model. Major VoIP Protocols 15 The major VoIP protocols

More information

Voice over IP (VoIP) Basics for IT Technicians

Voice over IP (VoIP) Basics for IT Technicians Voice over IP (VoIP) Basics for IT Technicians VoIP brings a new environment to the network technician that requires expanded knowledge and tools to deploy and troubleshoot IP phones. This paper provides

More information

Measurement of V2oIP over Wide Area Network between Countries Using Soft Phone and USB Phone

Measurement of V2oIP over Wide Area Network between Countries Using Soft Phone and USB Phone The International Arab Journal of Information Technology, Vol. 7, No. 4, October 2010 343 Measurement of V2oIP over Wide Area Network between Countries Using Soft Phone and USB Phone Mohd Ismail Department

More information

PERFORMANCE OF VOICE-OVER-IP OVER INET TELEMETRIC NETWORKS

PERFORMANCE OF VOICE-OVER-IP OVER INET TELEMETRIC NETWORKS PERFORMANCE OF VOICE-OVER-IP OVER INET TELEMETRIC NETWORKS Myron L. Moodie 1, Todd A. Newton 1, Thomas B. Grace 2, William A. Malatesta 2 1 Southwest Research Institute 2 Naval Air Systems Command (NAVAIR)

More information

Toll-bypass Long Distance Calling... 1. What Is VOIP?... 2. Immediate Cost Savings... 3. Applications... 3. Business Quality Voice...

Toll-bypass Long Distance Calling... 1. What Is VOIP?... 2. Immediate Cost Savings... 3. Applications... 3. Business Quality Voice... telephony internet access remote access modems Content Toll-bypass Long Distance Calling... 1 What Is VOIP?... 2 That Was Then... This is Now... Immediate Cost Savings... 3 Applications... 3 Office-to-office

More information

The Analysis and Simulation of VoIP

The Analysis and Simulation of VoIP ENSC 427 Communication Networks Spring 2013 Final Project The Analysis and Simulation of VoIP http://www.sfu.ca/~cjw11/427project.html Group #3 Demet Dilekci ddilekci@sfu.ca Conrad Wang cw11@sfu.ca Jiang

More information

An Analysis of the Skype Peer-to-Peer Internet Telephony Protocol

An Analysis of the Skype Peer-to-Peer Internet Telephony Protocol An Analysis of the Skype Peer-to-Peer Internet Telephony Protocol Written by: Salman A. Baset and Henning G. Schulzrinne (Colombia University, NY) CIS 6000 Distributed Systems Benjamin Ferriman bferrima@uoguelph.ca

More information

Performance Analysis Proposal

Performance Analysis Proposal 1. Title Performance Analysis Proposal Performance Analysis of P2P VoIP Applications 2. Objective To evaluate the dynamic behavior (i.e., CODEC usage) of VoIP P2P applications (e.g. Skype, Google Talk)

More information

Department of Communications and Networking. S-38.2131/3133 Networking Technology, laboratory course A/B

Department of Communications and Networking. S-38.2131/3133 Networking Technology, laboratory course A/B Department of Communications and Networking S-38.2131/3133 Networking Technology, laboratory course A/B Work Number 29: VoIP Student Edition Preliminary Exercises and Laboratory Assignments Original document

More information

IP Telephony (Voice over IP)

IP Telephony (Voice over IP) (Voice over IP) Instructor Ai-Chun Pang, acpang@csie.ntu.edu.tw Office Number: 417, New building of CSIE Textbook Carrier Grade Voice over IP, D. Collins, McGraw-Hill, Second Edition, 2003. Requirements

More information

The Problem with Faxing over VoIP Channels

The Problem with Faxing over VoIP Channels The Problem with Faxing over VoIP Channels Lower your phone bill! is one of many slogans used today by popular Voice over IP (VoIP) providers. Indeed, you may certainly save money by leveraging an existing

More information

Playout Controller QoS at the IP Edge Points For networks with packet loss and jitter Henrik Åström GLOBAL IP SOUND

Playout Controller QoS at the IP Edge Points For networks with packet loss and jitter Henrik Åström GLOBAL IP SOUND Playout Controller QoS at the IP Edge Points For networks with packet loss and jitter Henrik Åström GLOBAL IP SOUND Speech Processing, Transmission and Quality Aspects (STQ) Workshop Feb 2003 Outline VoIP

More information

WHITEPAPER. Quality of Service Testing in the VoIP Environment

WHITEPAPER. Quality of Service Testing in the VoIP Environment Quality of Service Testing in the VoIP Environment March 2005 In recent years, the business world has reaped tremendous benefits from the many exciting products and applications made possible by the marriage

More information

SAVE MONEY WITH THE RIGHT BUSINESS PHONE SYSTEM

SAVE MONEY WITH THE RIGHT BUSINESS PHONE SYSTEM Business Phone System & VOIP Service Buyer s Guide SAVE MONEY WITH THE RIGHT BUSINESS PHONE SYSTEM Enterprise Phone System Buyer s Guide Whether you are planning to purchase a new phone system or upgrade

More information

Integrate VoIP with your existing network

Integrate VoIP with your existing network Integrate VoIP with your existing network As organisations increasingly recognise and require the benefits voice over Internet Protocol (VoIP) offers, they stop asking "Why?" and start asking "How?". A

More information

White Paper. The Next Generation Video Codec Scalable Video Coding (SVC)

White Paper. The Next Generation Video Codec Scalable Video Coding (SVC) White Paper The Next Generation Video Codec Scalable Video Coding (SVC) Contents Background... 3 What is SVC?... 3 Implementations of SVC Technology: VIVOTEK as an Example... 6 Conclusion... 10 2 Background

More information

Hands on VoIP. Content. Tel +44 (0) 845 057 0176 enquiries@protelsolutions.co.uk. Introduction

Hands on VoIP. Content. Tel +44 (0) 845 057 0176 enquiries@protelsolutions.co.uk. Introduction Introduction This 4-day course offers a practical introduction to 'hands on' VoIP engineering. Voice over IP promises to reduce your telephony costs and provides unique opportunities for integrating voice

More information

Course 4: IP Telephony and VoIP

Course 4: IP Telephony and VoIP Course 4: IP Telephony and VoIP Telecommunications Technical Curriculum Program 3: Voice Knowledge 6/9/2009 1 Telecommunications Technical Curriculum Program 1: General Industry Knowledge Course 1: General

More information

VOICE over IP H.323 Advanced Computer Network SS2005 Presenter : Vu Thi Anh Nguyet

VOICE over IP H.323 Advanced Computer Network SS2005 Presenter : Vu Thi Anh Nguyet VOICE over IP H.323 Advanced Computer Network SS2005 Presenter : Vu Thi Anh Nguyet 1 Outlines 1. Introduction 2. QoS in VoIP 3. H323 4. Signalling in VoIP 5. Conclusions 2 1. Introduction to VoIP Voice

More information

Application Notes. Introduction. Sources of delay. Contents. Impact of Delay in Voice over IP Services VoIP Performance Management.

Application Notes. Introduction. Sources of delay. Contents. Impact of Delay in Voice over IP Services VoIP Performance Management. Application Notes Title Series Impact of Delay in Voice over IP Services VoIP Performance Management Date January 2006 Overview This application note describes the sources of delay in Voice over IP services,

More information

Contents. Specialty Answering Service. All rights reserved.

Contents. Specialty Answering Service. All rights reserved. Contents 1 Introduction... 2 2 PBX... 3 3 IP PBX... 4 3.1 How It Works... 4 3.2 Functions of IP PBX... 5 3.3 Benefits of IP PBX... 5 4 Evolution of IP PBX... 6 4.1 Fuelling Factors... 6 4.1.1 Demands from

More information

VoIP: How to Plan for the Bandwidth and Calculate the Cost Savings

VoIP: How to Plan for the Bandwidth and Calculate the Cost Savings Expert Reference Series of White Papers VoIP: How to Plan for the Bandwidth and Calculate the Cost Savings 1-800-COURSES www.globalknowledge.com VoIP: How to Plan for the Bandwidth and Calculate the Cost

More information

Configuration Guide. T.38 Protocol in AOS. 61950851L1-29.1D September 2011

Configuration Guide. T.38 Protocol in AOS. 61950851L1-29.1D September 2011 61950851L1-29.1D September 2011 Configuration Guide This configuration guide describes the T.38 fax protocol and its use on ADTRAN Operating System (AOS) voice products including a protocol overview, common

More information

www. broadbandasia.info www.lirneasia.net

www. broadbandasia.info www.lirneasia.net Broadband Quality of Service Experience (QoSE) Indicators 1 Price is not the only dimension that is of interest to customers and regulators. Quality of Service Experience (QoSE) is integrally connected

More information

Proactive Video Assurance through QoE and QoS Correlation

Proactive Video Assurance through QoE and QoS Correlation A Complete Approach for Quality and Service Assurance W H I T E P A P E R Introduction Video service providers implement new technologies to maximize the quality and diversity of their entertainment program

More information

Terms VON. VoIP LAN WAN CODEC

Terms VON. VoIP LAN WAN CODEC VON Voice Over the Net. Voice transmitted over the Internet. That is the technical definition. Prescient Worldwide s product, called VON, means Voice Over Network as in ANY network, whether a client s

More information

Delivering reliable VoIP Services

Delivering reliable VoIP Services QoS Tips and Tricks for VoIP Services: Delivering reliable VoIP Services Alan Clark CEO, Telchemy alan.d.clark@telchemy.com 1 Objectives Clear understanding of: typical problems affecting VoIP service

More information

VOIP Security Essentials. Jeff Waldron

VOIP Security Essentials. Jeff Waldron VOIP Security Essentials Jeff Waldron Traditional PSTN PSTN (Public Switched Telephone Network) has been maintained as a closed network, where access is limited to carriers and service providers. Entry

More information

CHAPTER 1 INTRODUCTION

CHAPTER 1 INTRODUCTION CHAPTER 1 INTRODUCTION 1.1 Overview Steganography is the process of hiding secret data inside other, normally transmitted data. In other words, as defined by [40] steganography means hiding of a secret

More information

Streaming Audio and Video

Streaming Audio and Video Streaming Audio and Video CS 360 Internet Programming Daniel Zappala Brigham Young University Computer Science Department Streaming Audio and Video Daniel Zappala 1/27 Types of Streaming stored audio and

More information

ZyXEL V100 Support Notes. ZyXEL V100. (V100 Softphone 1 Runtime License) Support Notes

ZyXEL V100 Support Notes. ZyXEL V100. (V100 Softphone 1 Runtime License) Support Notes ZyXEL V100 (V100 Softphone 1 Runtime License) Support Notes Version 1.00 April 2009 1 Contents Overview 1. Overview of V100 Softphone...3 2. Setting up the V100 Softphone.....4 3. V100 Basic Phone Usage.....7

More information

Monitoring and Managing Voice over Internet Protocol (VoIP)

Monitoring and Managing Voice over Internet Protocol (VoIP) Network Instruments White Paper Monitoring and Managing Voice over Internet Protocol (VoIP) As with most new technologies, Voice over Internet Protocol (VoIP) brings new challenges along with the benefits.

More information

Performance Analysis of Interleaving Scheme in Wideband VoIP System under Different Strategic Conditions

Performance Analysis of Interleaving Scheme in Wideband VoIP System under Different Strategic Conditions Performance Analysis of Scheme in Wideband VoIP System under Different Strategic Conditions Harjit Pal Singh 1, Sarabjeet Singh 1 and Jasvir Singh 2 1 Dept. of Physics, Dr. B.R. Ambedkar National Institute

More information

Voice Over Internet Protocol in Massively Multiplayer Online Gaming Vasilios Mitrokostas

Voice Over Internet Protocol in Massively Multiplayer Online Gaming Vasilios Mitrokostas Voice Over Internet Protocol in Massively Multiplayer Online Gaming Vasilios Mitrokostas An introduction to Internet Telephony How VoIP works Modern VoIP implementations VoIP in massively multiplayer online

More information

Voice and Video over Wireless LAN

Voice and Video over Wireless LAN International Journal of Scientific and Research Publications, Volume 3, Issue 9, September 2013 1 Voice and Video over Wireless LAN Akshay Iyer*, Akshay Badgujar*, Maheshkumar Eaga*, Rohit Iyer* *B.E

More information

Is Your Network Ready for VoIP? > White Paper

Is Your Network Ready for VoIP? > White Paper > White Paper Tough Questions, Honest Answers For many years, voice over IP (VoIP) has held the promise of enabling the next generation of voice communications within the enterprise. Unfortunately, its

More information

WHITE PAPER. Testing Voice over IP (VolP) Networks

WHITE PAPER. Testing Voice over IP (VolP) Networks WHITE PAPER Testing Voice over IP (VolP) Networks www.ixiacom.com P/N 915-1767-01 Rev B January 2014 2 Table of Contents VoIP Voice over IP... 4 VoIP Benefits... 4 VoIP Challenges... 4 Network requirements

More information

B12 Troubleshooting & Analyzing VoIP

B12 Troubleshooting & Analyzing VoIP B12 Troubleshooting & Analyzing VoIP Phillip Sherlock Shade, Senior Forensics / Network Engineer Merlion s Keep Consulting phill.shade@gmail.com Phillip Sherlock Shade (Phill) phill.shade@gmail.com Phillip

More information

Voice Over IP Performance Assurance

Voice Over IP Performance Assurance Voice Over IP Performance Assurance Transforming the WAN into a voice-friendly using Exinda WAN OP 2.0 Integrated Performance Assurance Platform Document version 2.0 Voice over IP Performance Assurance

More information

Application Note. Introduction. Definition of Call Quality. Contents. Voice Quality Measurement. Series. Overview

Application Note. Introduction. Definition of Call Quality. Contents. Voice Quality Measurement. Series. Overview Application Note Title Series Date Nov 2014 Overview Voice Quality Measurement Voice over IP Performance Management This Application Note describes commonlyused call quality measurement methods, explains

More information