Research Report. By An T. Le Oct 2005 Supervisor: Prof. Ravi Sankar, Ph.D. Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 1
|
|
- Dylan Stokes
- 8 years ago
- Views:
Transcription
1 Research Report By An T. Le Oct 2005 Supervisor: Prof. Ravi Sankar, Ph.D. Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 1
2 Today s Topics 1. Voice over IP and IP PBX (part 2) SIP architecture Firewall, NAT and VoIP issues VoIP CODECs Demo: VoIP PBX system 2. Speech under Stress and applications Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 2
3 PART 1 Voice over IP and IP PBX (2) PBX and VoIP PBX VoIP materials VoIP Protocols VoIP QoS VoIP issues Demo Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 3
4 PBX (Private Branch exchange) Voice switching: local subscriber- local subscriber local subscriber- publics network remote subscriber Telephone Telephone Telephone PSTN Telephone Telephone PBX PBX Telephone Telephone Telephone Telephone Telephone Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 4
5 VoIP Voice-over-IP (VoIP) implementation enables users to carry voice traffic (telephone calls, faxes ) over an IP network. VoIP can have different type Gateways: IP, PSTN, PRI Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 5
6 * 8 # * 8 # Bay Networks SD Bay Networks SD Today s VoIP network IP Gateway- Router Gateway- Router LAN VoIP Server/ PBX VoIP Server/ PC IP Phone IP Phone PC PSTN gateway PSTN gateway PSTN Fax Analog Phone Analog Phone Fax Bay Networks BayStack 650 Wireless Access Point Bay Networks BayStack 650 Wireless Access Point Local Telephone Service C.O. C.O. Analog Phone Local Telephone Service Analog Phone Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 6
7 Why VoIP? Low cost phone calls? LAN-based PBX for cost reduction, flexibility, and new applications: Integrated voice/data LAN infrastructure (Merging of data/voice infrastructures) Integrated voice/data applications Open hardware/software platform Add-on services and unified messaging Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 7
8 VoIP materials Minimum IP Phone a phone and also a network device VoIP Server or just an IP switch Your PC could be both VoIP Server is an IP PBX Other Gateway converts media provided in one type of network to the format required for another type of network. In VoIP the Gateway to connect to PSTN could be an FXO port or T1/E1 (for PRI service) Call manager Call agent Other applications Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 8
9 VoIP Protocols Using Real-Time Transport Protocol/User Datagram Protocol/Internet Protocol (RTP/UDP/IP) as the protocol stack Most popular: SIP: Session Initiation Protocol (RFC 3261) Skinny: Skinny Client Control Protocol (SCCP) (by CISCO) Others: H.323 (ITU), SDP: Session Description Protocol Megaco H.248: Gateway Control Protocol MGCP: Media Gateway Control Protocol MIME: Multipurpose Internet Mail Extensions RVP over IP: Remote Voice Protocol Over IP Specification IAX (IAX2) Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 9
10 CODEC - VOCODER In VoIP Coders are used for efficient bandwidth utilization. Different coding techniques for telephony and voice packet are standardized by the ITU-T in its G-series recommendations: G.723.1, G.729, G.729A etc. Other popular VoIP vocoders are G.711 and GSM Standard Description Bandwidth (Kbps) Coding delay G.711 PCM 64 1 µ s G.721 ADPCM 32,16,24, µs G.728 LD-CELP µ s G.729 CS-ACLEP ms G Muti-rate CELP 6.3/5.3 30ms Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 10
11 VoIP QoS again Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 11
12 IP PBX features Web interface Call ID Call forward Conference call Multi lines per IP phone Multi - destinations call Music on hold Directory Auto attendant Call waiting Voice mail Voice mail to Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 12
13 VoIP issues QoS Security Network conflicts High cost for IP phone Use high IP bandwidth Delay time, Echo (not a pure real-time voice) May have no emergency service such as 911 Need an IP service for a phone call Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 13
14 VoIP Security Service Deny of Service, free use of service Information Insert to the call Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 14
15 Firewall issue Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 15
16 Network Address Translator Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 16
17 NAT and Firewall issue Unknown public source Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 17
18 SIP (Session Initiation Protocol) Architecture Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 18
19 SIP with NAT and Firewall issue Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 19
20 Solution for NAT-SIP-Firewall The current proposals for solving NAT traversal are: Universal Plug and Play (UPnP) Simple Traversal of UDP Through Network Address Translation devices (STUN) Application Layer Gateway Manual Configuration Tunnel Techniques Automatic Channel Mapping (ACM) Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 20
21 CODEC (Compression and DeCompression) Compress and De-Compress digitized voice stream is necessary. Digitized (Coder)+Compress = CO Decompress+D/A (Decoder)= DEC Coder/Decoder Waveform Modeling based (need power processor) Hybrid Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 21
22 Most popular CODEC is LPC based Predicted value x (n+d) x ˆ = H ( x, x... x 1 ) n+ d 0 1 n xˆ p n+ d = ( k = 1 a k ) x n k Error: e n+ d xn+ d xn+ d = ˆ QoS: d, interval, p-order Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 22
23 G.729 and GSM Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 23
24 DEMO IP PBX OS Platform Features Devices Management Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 24
25 PART 2 Speech under Stress and applications Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 25
26 CONTENT Classification of Speech under Stress Energy based and Frequency based analysis SUSAS: Stress Under Simulated and Actual Stress Database Applications Next steps Shorten: Simple lossless and near loss-less waveform compression Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 26
27 Classification of Speech Under Stress Human Speech Production Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 27
28 Stress makes change in Speech Local neuron take control the muscle Generate higher energy especially at the begin of word Use higher pitch (or lower) than normal Vibrated sound (tremor) Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 28
29 Human Speech Production Human Speech model Tone controller Formant Excitation F1,t(n)+F2,t(n)+F3,t(n) Pitch (F 0,t (n)) Glottal Model Formant filters Radiation Model Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 29
30 Abnormal Speech Under stress, speech changes tones speech energy Vibration (tremor) Speech changes as unusual when: Yield Bored or tired Emphasis Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 30
31 Speech Under Stress Analysis Learning (from large samples) Features or patterns Feature set or pattern set? Energy-based Frequency based Classifier or Evaluator (yes/no or % in stress) How about Foreign Languages? Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 31
32 Speech Under Stress Classification Energy-based focus on Estimate vocal tract area profiles Acoustic tube area coefficient Mel-cepstral based parameters (MFCC) Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 32
33 Mel-cepstral based parameters (MFCC) The typical parameters of a MFCC feature front end (e.g., 25 ms window, 10 ms frame rate) A compromise solution chosen to represent all phones, constraint of a fixed single set of parameters MFCC features may fail to capture many discriminative cues that have longer or shorter time spans. Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 33
34 Stress Classification features TEO- Teager Energy Operator A energy operator, with the supporting observation that hearing is the process of detecting the energy By Kaiser ψ [ x( t)] c ψ c = [ x( t)] d dt x( t) 2 d x( t) dt x( t) = [ x& ( t)] where is the Teager Energy Operator and x(t) is the single component of the continuous speech signal Discrete time form: x( t) & x( t) ψ c [ x( n)] 2 = x ( n) x( n + 1) x( n 1) Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 34
35 TEO- Teager Energy Operator (cont.) TEO-FM-Var: Variation of FM component TEO-Auto-Env: Normalized TEO Autocorrelation Envelope Area TEO-CB-Auto-Env: Critical Band Based TEO Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 35
36 TEO- Teager Energy Operator (cont.) TEO-FM-Var: Variation of FM component Neural (left) Stressed (right) Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 36
37 TEO- Teager Energy Operator (cont.) TEO-Auto-Env: Normalized TEO Autocorrelation Envelope Area Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 37
38 TEO- Teager Energy Operator (cont.) TEO-CB-Auto-Env: Critical Band Based TEO Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 38
39 Evaluation Speech Under Stress Classification From Guojun Zhou, John H.L. Hansen and James F. Kaiser Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 39
40 SUSAS: Stress Under Simulated and Actual Stress Database Lead by John H.L. Hansen Frequency based created by the Robust Speech Processing Laboratory at Duke University under the direction of Professor John H. L. Hansen sponsored by the Air Force Research Laboratory. 32 speakers (13 female, 19 male), with ages ranging from 22 to 76 were employed to generate in excess of 16,000 utterances. contains several longer speech files from four Apache helicopter pilots. These helicopter speech files were transcribed by the Linguistic Data Consortium and are available via ftp. Use shorten format audio files Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 40
41 Practice based on SUSAS Database Read and convert shorten format to ASCII or other use with matlab Compare real paired samples Compared simulated samples Compare SUSAS and recorded samples Estimation Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 41
42 Example with word : change female 0.25 neutral 0.8 scream tired 0.2 others Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 42
43 Energy-based systems CVSA (Computerized Voice Stress Analyzer) DVSA (Digital voice Stress Analyzer) Digoenes Lantern Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 43
44 Frequency-based system TiPi 6.40 Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 44
45 Speech Under Stress Study Applications Stress detector Call center Customer support center Safety control Lie detector Still under develop Speech enhancement Lullaby Sound therapy Sound effect Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 45
46 Next steps Speech patterns for speech under stress Speech features set and learning algorithms- Classifier based on learning machine Behavior alarm for call center Lie detectors Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 46
47 Shorten: Simple lossless and near loss-less waveform compression The predictor is predicting a future value xn+d from n past values from x0 to xn-1 as following: (2.1) xˆ n+ d = H( x0, x1... xn 1) Where d is the prediction distance (interval) and H is the transform. There is a linear model for H as following [11,14]: p xˆ = ( a ) x (2.2) n+ d k = 1 Where p is the order of predictor, {ak} is the linear predictor coefficients And the error is k n k e n+ d xn+ d xn+ d = ˆ Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 47
48 The method Wiener Hoft we ve got all-pole Wiener- Hopf: r r r x x x (0) (1)... ( n) r r r xˆ( n x x x (1) (2)... (0) + d) = r x p 1 k = 0 w( k) x( n k) rx ( n) w(0) rx ( d) r x(0) w(1) rx ( d + 1) = ( n 1) w( n) rx ( d + n 1) where rx is the autocorrelation of X, w(0) w(n) is the coefficient and d is the predicted distance. Oct 28, 2005 An T. Le -USF- ICONS group - SUS ans VoIP 48
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 informationVoIP Bandwidth Considerations - design decisions
VoIP Bandwidth Considerations - design decisions When calculating the bandwidth requirements for a VoIP implementation the two main protocols are: a signalling protocol such as SIP, H.323, SCCP, IAX or
More informationOverview of Voice Over Internet Protocol
Overview of Voice Over Internet Protocol Purva R. Rajkotia, Samsung Electronics November 4,2004 Overview of Voice Over Internet Protocol Presentation Outline History of VoIP What is VoIP? Components of
More informationAn 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 informationVoice 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 informationReceiving 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 informationSimple Voice over IP (VoIP) Implementation
Simple Voice over IP (VoIP) Implementation ECE Department, University of Florida Abstract Voice over IP (VoIP) technology has many advantages over the traditional Public Switched Telephone Networks. In
More informationIndepth 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 informationVoice 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 informationSIP 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- Basic Voice over IP -
1 Voice over IP (VoIP) - Basic Voice over IP - Voice over IP (VoIP) is a digital form of transport for voice transmissions, replacing analog phone systems. The benefits of VoIP are considerable: Better
More informationHands 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 informationConnect your Control Desk to the SIP world
Connect your Control Desk to the SIP world Systems in
More informationNeed for Signaling and Call Control
Need for Signaling and Call Control VoIP Signaling In a traditional voice network, call establishment, progress, and termination are managed by interpreting and propagating signals. Transporting voice
More informationVoIP 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 informationOptimizing Converged Cisco Networks (ONT)
Optimizing Converged Cisco Networks (ONT) Module 2: Cisco VoIP Implementations (Deploy) Calculating Bandwidth Requirements for VoIP Objectives Describe factors influencing encapsulation overhead and bandwidth
More informationTroubleshooting Voice Over IP with WireShark
Hands-On Course Description Voice over IP is being widely implemented both within companies and across the Internet. The key problems with IP voice services are maintaining the quality of the voice service
More informationVOICE 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 informationLab Introduction software Voice over IP
Lab Introduction software Voice over IP 1 Lab Capability and Status Software used in this course installed in Engineering labs including the lab opened for students ENGR1506 - http://labs.ite.gmu.edu/
More informationVoice over IP (VoIP) for Telephony. Advantages of VoIP Migration for SMBs BLACK BOX. 724-746-5500 blackbox.com
Voice over IP (VoIP) for Telephony Advantages of VoIP Migration for SMBs BLACK BOX Hybrid PBX VoIP Gateways SIP Phones Headsets 724-746-5500 blackbox.com Table of Contents Introduction...3 About Voice
More informationIP- PBX. Functionality Options
IP- PBX Functionality Options With the powerful features integrated in the AtomOS system from AtomAmpd, installing & configuring a cost- effective and extensible VoIP solution is easily possible. 4/26/10
More informationWhite Paper: Voice Over IP Networks
FREE FREE One One Hour Hour VoIPonline VoIPonline Seminar TM Seminar TM For additional information contact: Terry Shugart - tshugart@analogic.com http://www.analogic.com/cti TEL: 978-977-3000 FAX: 978-977-6813
More informationPerformance 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 informationUnderstanding Voice over IP
Introduction Understanding Voice over IP For years, many different data networking protocols have existed, but now, data communications has firmly found its home in the form of IP, the Internet Protocol.
More informationVoice over IP. Abdus Salam ICTP, February 2004 School on Digital Radio Communications for Research and Training in Developing Countries
Voice over IP Abdus Salam ICTP, February 2004 School on Digital Radio Communications for Research and Training in Developing Countries Ermanno Pietrosemoli Latin American Networking School (Fundación EsLaRed)
More informationCurso 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 informationCVOICE Exam Topics Cisco Voice over IP Exam #642-432 7/14/2005
CVOICE Exam Topics Cisco Voice over IP Exam #642-432 7/14/2005 From the Cisco CVOICE 642-432 Exam Topics Voice over IP Technologies Describe the similarities and differences between PSTN and VoIP including
More informationCurso de Telefonía IP para el MTC. Sesión 1 Introducción. Mg. Antonio Ocampo Zúñiga
Curso de Telefonía IP para el MTC Sesión 1 Introducción Mg. Antonio Ocampo Zúñiga Conceptos Generales VoIP Essentials Family of technologies Carries voice calls over an IP network VoIP services convert
More informationGoal 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 information4. H.323 Components. VOIP, Version 1.6e T.O.P. BusinessInteractive GmbH Page 1 of 19
4. H.323 Components VOIP, Version 1.6e T.O.P. BusinessInteractive GmbH Page 1 of 19 4.1 H.323 Terminals (1/2)...3 4.1 H.323 Terminals (2/2)...4 4.1.1 The software IP phone (1/2)...5 4.1.1 The software
More informationQoS 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 informationCisco Networks (ONT) 2006 Cisco Systems, Inc. All rights reserved.
Optimizing Converged Cisco Networks (ONT) reserved. Lesson 2.4: Calculating Bandwidth Requirements for VoIP reserved. Objectives Describe factors influencing encapsulation overhead and bandwidth requirements
More informationB12 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 informationCourse 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 informationicall 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 informationPETER CUTLER SCOTT PAGE. November 15, 2011
Future of Fax: SIP Trunking PETER CUTLER SCOTT PAGE November 15, 2011 QUESTIONS AND ANSWERS TODAY S SPEAKERS Peter Cutler Vice President of Sales Instant InfoSystems Scott Page Subject Matter Expert Dialogic
More informationMobile VoIP: Managing, scheduling and refining voice packets to and from mobile phones
Mobile VoIP: Managing, scheduling and refining voice packets to and from mobile phones MOHAMMAD ABDUS SALAM Student ID: 01201023 TAPAN BISWAS Student ID: 01201003 \ Department of Computer Science and Engineering
More informationBroadband 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 informationVoIP. Overview. Jakob Aleksander Libak jakobal@ifi.uio.no. Introduction Pros and cons Protocols Services Conclusion
VoIP Jakob Aleksander Libak jakobal@ifi.uio.no 1 Overview Introduction Pros and cons Protocols Services Conclusion 2 1 Introduction Voice over IP is routing of voice conversations over the internet or
More informationPacketized Telephony Networks
Packetized Telephony Networks Benefits of Packet Telephony Networks Traditionally, the potential savings on long-distance costs was the driving force behind the migration to converged voice and data networks.
More informationZyXEL 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 informationGateways and Their Roles
Gateways and Their Roles Understanding Gateways This topic describes the role of voice gateways and their application when connecting VoIP to traditional PSTN and telephony equipment. Analog vs. Digital
More informationVoice Over IP. Priscilla Oppenheimer www.priscilla.com
Voice Over IP Priscilla Oppenheimer www.priscilla.com Objectives A technical overview of the devices and protocols that enable Voice over IP (VoIP) Demo Packet8 and Skype Discuss network administrator
More information12 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 informationRequirements 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 information5. DEPLOYMENT ISSUES Having described the fundamentals of VoIP and underlying IP infrastructure, let s address deployment issues.
5. DEPLOYMENT ISSUES Having described the fundamentals of VoIP and underlying IP infrastructure, let s address deployment issues. 5.1 LEGACY INTEGRATION In most cases, enterprises own legacy PBX systems,
More informationVoice over IP. Better answers
This white paper provides an overview of voice and data convergence. It discusses enabling business drivers and technical factors, such as compression techniques and QOS parameters, that have complemented
More informationVoIP-PSTN Interoperability by Asterisk and SS7 Signalling
VoIP-PSTN Interoperability by Asterisk and SS7 Signalling Jan Rudinsky CESNET, z. s. p. o. Zikova 4, 160 00 Praha 6, Czech Republic rudinsky@cesnet.cz Abstract. PSTN, the world's circuit-switched network,
More informationVoIP and IP Telephony
VoIP and IP Telephony Reach Out and Ping Someone ISAC Spring School 2006 21 March 2006 Anthony Kava, Sr. Network Admin Pottawattamie County IT Definition VoIP Voice over Internet Protocol Voice Transport
More informationIP PBX using SIP. Voice over Internet Protocol
IP PBX using SIP Voice over Internet Protocol Key Components for an IP PBX setup Wireless/Fiber IP Networks (Point to point/multi point, LAN/WAN/Internet) Central or Multicast SIP Proxy/Server based Virtual
More informationESI SIP Trunking Installation Guide
ESI SIP Trunking Installation Guide 0450-1227 Rev. B Copyright 2009 ESI (Estech Systems, Inc.). Information contained herein is subject to change without notice. ESI products are protected by various U.S.
More informationEarthLink Business SIP Trunking. ININ IC3 IP PBX Customer Configuration Guide
EarthLink Business SIP Trunking ININ IC3 IP PBX Customer Configuration Guide Publication History First Release: Version 1.0 August 30, 2011 CHANGE HISTORY Version Date Change Details Changed By 1.0 8/30/2011
More informationChallenges and Solutions in VoIP
Challenges and Solutions in VoIP Challenges in VoIP The traditional telephony network strives to provide 99.99 percent uptime to the user. This corresponds to 5.25 minutes per year of down time. Many data
More informationEarthLink Business SIP Trunking. NEC SV8100 IP PBX Customer Configuration Guide
EarthLink Business SIP Trunking NEC SV8100 IP PBX Customer Configuration Guide Publication History First Release: Version 1.0 August 30, 2011 CHANGE HISTORY Version Date Change Details Changed By 1.0 8/30/2011
More informationEarthLink Business SIP Trunking. Toshiba IPedge Customer Configuration Guide
EarthLink Business SIP Trunking Toshiba IPedge Customer Configuration Guide Publication History First Release: Version 1.0 August 30, 2011 CHANGE HISTORY Version Date Change Details Changed By 1.0 8/30/2011
More informationEnterprise VoIP. Silvano Gai. ftp://ftpeng.cisco.com/sgai/t2000voip.pdf. Cisco Systems, USA Politecnico di Torino, IT sgai@cisco.com.
Enterprise Vo Terena 2000 ftp://ftpeng.cisco.com/sgai/t2000voip.pdf Silvano Gai Cisco Systems, USA Politecnico di Torino, IT sgai@cisco.com Terena 2000 1 Compass Motivation for Vo Voice over in the Enterprise
More informationSIP (Session Initiation Protocol) Technical Overview. Presentation by: Kevin M. Johnson VP Engineering & Ops
SIP (Session Initiation Protocol) Technical Overview Presentation by: Kevin M. Johnson VP Engineering & Ops Page 1 Who are we? Page 2 Who are we? Workforce Automation Software Developer Page 3 Who are
More informationWhite Paper. Solutions to VoIP (Voice over IP) Recording Deployment
White Paper Solutions to VoIP (Voice over IP) Recording Deployment Revision 2.1 September 2008 Author: Robert Wright (robert.wright@ultra-audiosoft.com), BSc (Hons) Ultra Electronics AudioSoft, October
More informationEarthLink Business SIP Trunking. Switchvox SMB 5.5 & Adtran SIP Proxy Implementation Guide
EarthLink Business SIP Trunking Switchvox SMB 5.5 & Adtran SIP Proxy Implementation Guide Publication History First Release: Version 1.0 April 20, 2012 CHANGE HISTORY Version Date Change Details Changed
More informationIntroduction to Packet Voice Technologies and VoIP
Introduction to Packet Voice Technologies and VoIP Cisco Networking Academy Program Halmstad University Olga Torstensson 035-167575 olga.torstensson@ide.hh.se IP Telephony 1 Traditional Telephony 2 Basic
More informationRadio over Internet Protocol (RoIP)
Radio over Internet Protocol (RoIP) Presenter : Farhad Fathi May 2012 What is VoIP? [1] Voice over Internet Protocol is a method for taking analog audio signals, like the kind you hear when you talk on
More informationClearing 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 informationImplementation of Voice over IP and Audio over IP in the Studio environment
Mediatech 2015 Implementation of Voice over IP and Audio over IP in the Studio environment Wilfried Hecht, Managing Director AVT Audio Video Technologies GmbH Nordostpark 12 90411 Nuernberg Germany Email:
More informationCisco CME Features and Functionality
Cisco CME Features and Functionality Supported Protocols and Integration Options This topic describes the supported protocols and integration options of Cisco CME. Supported Protocols and Integration FAX
More informationCrash Course in Asterisk
Crash Course in Asterisk Despite its name, Asterisk is no mere footnote to the IP-PBX market. The open source product is one of the most disruptive technologies in the industry. Here s what you need to
More informationDelivering 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 informationAgilent Technologies Performing Pre-VoIP Network Assessments. Application Note 1402
Agilent Technologies Performing Pre-VoIP Network Assessments Application Note 1402 Issues with VoIP Network Performance Voice is more than just an IP network application. It is a fundamental business and
More informationCombining 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 informationEarthLink Business SIP Trunking. NEC SV8300 IP PBX Customer Configuration Guide
EarthLink Business SIP Trunking NEC SV8300 IP PBX Customer Configuration Guide Publication History First Release: Version 1.0 May 18, 2012 CHANGE HISTORY Version Date Change Details Changed By 1.0 5/18/2012
More informationTopologies, Equipment, and Communications
4801_CH02 Page 31 Tuesday, August 7, 2001 11:41 AM 2 Topologies, Equipment, and Communications In order for the reader to appreciate the level of complexity involved with the definition of a robust and
More information640-460. IIUC Implementing Cisco IOS Unified Communications (IIUC) Version: Demo. Page <<1/9>>
640-460 IIUC Implementing Cisco IOS Unified Communications (IIUC) Version: Demo Page 1. You are CCNA VOICE associate in XXXX.com. You need configure a voice port that will allow the gateway to
More informationSecure VoIP Transmission through VPN Utilization
Secure VoIP Transmission through VPN Utilization Prashant Khobragade Department of Computer Science & Engineering RGCER Nagpur, India prashukhobragade@gmail.com Disha Gupta Department of Computer Science
More informationContents Introduction Why Fax over IP? How Real-time Fax over IP works Implementation with MessagePlus/Open Summary. About this document
Fax over IP Contents Introduction Why Fax over IP? How Real-time Fax over IP works Implementation with MessagePlus/Open Summary About this document This document describes how Fax over IP works in general
More informationIP Telephony Deployment Models
CHAPTER 2 Sections in this chapter address the following topics: Single Site, page 2-1 Multisite Implementation with Distributed Call Processing, page 2-3 Design Considerations for Section 508 Conformance,
More informationNetwork Connection Considerations for Microsoft Response Point 1.0 Service Pack 2
Network Connection Considerations for Microsoft Response Point 1.0 Service Pack 2 Updated: February 2009 Microsoft Response Point is a small-business phone solution that is designed to be easy to use and
More informationIs 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 informationUsing Asterisk with Odin s OTX Boards
Using Asterisk with Odin s OTX Boards Table of Contents: Abstract...1 Overview...1 Features...2 Conclusion...5 About Odin TeleSystems Inc...5 HeadQuarters:...6 Abstract Odin TeleSystems supports corporate
More informationVoice over IP is Transforming Business Communications
White Paper Voice over IP is Transforming Business Communications Voice over IP (VoIP) is changing the world of telecommunications. It entails the transmission of voice calls over data networks that support
More informationPERFORMANCE 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 informationSimulation of SIP-Based VoIP for Mosul University Communication Network
Int. J. Com. Dig. Sys. 2, No. 2, 89-94(2013) 89 International Journal of Computing and Digital Systems http://dx.doi.org/10.12785/ijcds/020205 Simulation of SIP-Based VoIP for Mosul University Communication
More informationSoftware 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 informationVoIP Bandwidth Calculation
VoIP Bandwidth Calculation AI0106A VoIP Bandwidth Calculation Executive Summary Calculating how much bandwidth a Voice over IP call occupies can feel a bit like trying to answer the question; How elastic
More informationApplication 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 informationehealth and VoIP Overview
ehealth and VoIP Overview Voice over IP (VoIP) configurations can be very complex. Your network could contain a variety of devices, applications, and configuration capabilities to support voice traffic.
More informationVoIP in 802.11. Mika Nupponen. S-72.333 Postgraduate Course in Radio Communications 06/04/2004 1
VoIP in 802.11 Mika Nupponen S-72.333 Postgraduate Course in Radio Communications 06/04/2004 1 Contents Introduction VoIP & WLAN Admission Control for VoIP Traffic in WLAN Voice services in IEEE 802.11
More information640-460 - Implementing Cisco IOS Unified Communications (IIUC)
640-460 - Implementing Cisco IOS Unified Communications (IIUC) Course Introduction Course Introduction Module 1 - Cisco Unified Communications System Introduction Cisco Unified Communications System Introduction
More informationApplication Notes for Configuring SIP Trunking between Metaswitch MetaSphere CFS and Avaya IP Office Issue 1.0
Avaya Solution & Interoperability Test Lab Application Notes for Configuring SIP Trunking between Metaswitch MetaSphere CFS and Avaya IP Office Issue 1.0 Abstract These Application Notes describe the steps
More informationTECHNICAL 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 informationVoIP from A to Z. NAEO 2009 Conference Cancun, Mexico
VoIP from A to Z NAEO 2009 Conference Cancun, Mexico VoIP glossary What is VoIP? Bandwidth Signaling Codecs Quality of Service (QoS) What is VoIP? Voice over Internet Protocol (VoIP) is the method of transmitting
More informationCase in Point. Voice Quality Parameter Tuning
Case in Point To continue our efforts to help you with your network needs, we will be making several real-world network troubleshooting case studies available to you. The attached case study,, discusses
More informationApplication Notes for Configuring a SonicWALL VPN with an Avaya IP Telephony Infrastructure - Issue 1.0
Avaya Solution & Interoperability Test Lab Application Notes for Configuring a SonicWALL VPN with an Avaya IP Telephony Infrastructure - Issue 1.0 Abstract These Application Notes describe the steps for
More informationSIP: NAT and FIREWALL TRAVERSAL Amit Bir Singh Department of Electrical Engineering George Washington University
SIP: NAT and FIREWALL TRAVERSAL Amit Bir Singh Department of Electrical Engineering George Washington University ABSTRACT The growth of market for real-time IP communications is a big wave prevalent in
More informationProject 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 informationPanasonic KX-NCP500 KXNCP500 KX NCP500 KX-NCP1000 KXNCP1000 KX NCP1000
Model No. KX-NCP500 KX-NCP1000 www.voicesonic.com Phone 877-289-2829 IP Networking Guide Pure IP-PBX Panasonic KX-NCP500 KXNCP500 KX NCP500 KX-NCP1000 KXNCP1000 KX NCP1000 Thank you for purchasing a Panasonic
More informationFrequently Asked Questions about Integrated Access
Frequently Asked Questions about Integrated Access Phone Service How are local, long distance, and international calls defined? Local access transport areas (LATAs) are geographical boundaries set by the
More informationMAXCS Release 7.0. Application Note: Remote MultiVoIP Gateway Configuration. Intended audience: AltiGen Authorized Partners
MAXCS Release 7.0 Application Note: Remote MultiVoIP Gateway Configuration Intended audience: AltiGen Authorized Partners March 4, 2014 Contents Introduction... 3 Requirements... 3 MultiVoIP Gateway Configuration...
More informationLeveraging Asterisk to Deliver Large Scale VoIP Services in a Carrier Environment. JR Richardson
Leveraging Asterisk to Deliver Large Scale VoIP Services in a Carrier Environment JR Richardson Early VoIP Environment Telecom Act of 1996, mass competition, Telco's needed value add features and capabilities,
More informationVOICE 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 informationThank you for purchasing a Panasonic Pure IP-PBX. Please read this manual carefully before using this product and save this manual for future use.
IP Networking Guide Model No. Pure IP-PBX KX-NCP500 KX-NCP1000 Thank you for purchasing a Panasonic Pure IP-PBX. Please read this manual carefully before using this product and save this manual for future
More informationIntegrate 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