How To: Diagnose Poor VoIP Calls through diagnostics.
|
|
- Beryl Henry
- 8 years ago
- Views:
Transcription
1 How To: Diagnose Poor VoIP Calls through diagnostics. When problems arise with poor VoIP phone calls, where do you start looking to troubleshoot the issue? This is one of the many challenges of managing an IP Telephony-environment. The end user has to deal with a new issue they rarely came across in the traditional telephony world, a bad phone call. Couple that with some poor explanations by the end-user of what a bad phone call is like (laden with echoes, noise, and delays in the conversation), and as a voice or network engineer, you may have to hard time figuring out where to start diagnosing the issue. Is it the IP Telephony system? Perhaps the network is having issues? Maybe the user is simple dreaming there s an echo? How would you really want to figure out what is going on? Other factors to consider include the idea that you are only as good as your weakest link. That is to say that if one hop of the path of a phone call crosses a router with an incorrect QoS configuration, or even the dreaded half-duplex mode still enabled, then this will hinder the entire phone call. Soft phones are also heavily in use. These are easy to deploy and cost much less than VoIP phones. They are still however just as susceptible to the same problems as real phones plus have other factors like the performance of the desktop or laptop that may hinder the call quality. Luckily, in this industry, we have some defined standard for measuring good quality phone calls. They are as follows: Metrics Acceptable Good MOS (Mean Opinion Score) >3.6 >4.08 R-Value >70 >80 Delay <400ms <150ms Jitter <150ms <60ms Packet loss <1% <0.5% Furthermore, we have choices to make for what codec we can use for audio compression levels depending on the bandwidth available to us. Common codecs includes G.711u/a and G.729. The difference being that the latter is a compressed packet 1/8 th the size. Being a compressed voice packet means the margin of error has dropped considerably for network issues to impact the voice quality. Things really do need to be working well if you are using VoIP over small network links. Using NetIQ s Vivinet Diagnostics application, we have a means to determine problem resolution. This test would be based on synthetic data that would be created between two locations on the internal network. This way we can at least isolate if the problem is internal or if it is perhaps part of the WAN link (if there is one). NetIQ can manage IP Telephony solutions from a Cisco, Nortel, Avaya, or Microsoft, but in the example below, we will focus on using software endpoints (probes on the network) to generate a synthetic call using the same codec and possibly QoS tags that may be in use in the production voice system. We will then 1
2 execute a manual test between these two endpoints to determine what degradation occurs in the phone call and where to start troubleshooting the issue. This type of diagnosis is vendor-agnostic as it can work with any platform of IP Telephony solution. However, to analyse the network, the best results occur from diagnosing a network that is using Cisco or Nortel switches or routers as we can achieve a better analysis. What you need: 1. NetIQ Performance endpoints a. Download and install for the operating system of choice: i NetIQ Vivinet Diagnostics a. Download and install (Please contact your local NetIQ Representative for a trial key - ) i. You can download a trial here > 3. A PC to run the Diagnostics application (can be a laptop, desktop, or server running Windows Server 2000 SP3+, or 2003 Server) 4. At least 2 PCs to run the endpoint software (can again be a laptop, desktop, or server running Windows 2000 SP3+, XP, 2003 Server, or Linux) For the PCs that will run the endpoint software, it is strongly recommended that these sit as close to the phones on the network. By this we mean the same VLAN is possible. Therefore we can get the most accurate depiction of all the hops in the network the voice traffic traverses to get to its destination. When looking at the main Diagnostics windows, you can define your call test. Here we will define IP addresses o f the endpoints. However, if you provide the logon information for a Cisco Call Manager or Nortel CS1K, you could also target real phones. 2
3 Once choosing the appropriate codec and QoS tag (if being used), running the diagnostic will automatically populate the trace of the call. Note: We will need the SNMP read strings in use for routers and switches for interrogation. Enter them in the options > SNMP menu. Once the diagnosis is complete, we can see there are red X marks and warning signs depicting issues. Also, click on the objects and links will yield information about that device or connection. 3
4 Next we see information collected on the network devices and links. The real guts of a problem with a call come from the report view. This view is designed to take all the issues that have been determined by Diagnostics during its analysis (based on its built-in knowledge) and present them to you in a prioritised list highlighting the most common issues first. This information also shows the results of the synthetic call based on the industry standard targets described above for call quality. Therefore we see not only the quality of the test call, but also all the possible issues along the way that could have caused problems. This also takes into consideration that RTP (voice streams) traffic moves in one-way directions so we need to make two traces for each direction. Therefore we can determine if we are running into asynchronous routing issues. The following screen is a summary of the problems for the report view. 4
5 This report could easily be considered the starting point for where to begin troubleshooting. Let s take a closer look at some of the common issues affecting VoIP calls today: 1. Network impairments a. Echoes in a call, words cutting out, delay in the conversation these are all examples of how network impairments affect the call. Packet loss, end-to-end delay, and high congestion on ports are examples of where we see poor call quality. b. Incorrect priority queuing for RTP streams c. Jitter buffer loss running high d. Half-duplex configuration 5
6 e. Congestion on the ports f. Asynchronous routing g. High link utilisation 2. Soft phone considerations a. Operating system performance b. Resource constraints on the desktop c. Insufficient bandwidth when connecting in via VPN over slow links (public wi-fi locations, etc) d. Poor packetisation delay 3. WAN links a. Incorrect QoS configurations b. High congestion These are just a sample of the issues that could be affecting a phone call. Many more things come into play. However, having a starting point to focus on may help save considerable time and effort for in-depth problem resolution. The time it takes to resolve these issues is key because now that you ve gone to using IP-Telephony, you ve just created a new mission-critical application to manage on your existing data network voice. Contact your NetIQ Sales Representative on managing your IP Telephony Environments. This document was written by Haf Saba. Snr. NetIQ Solutions Specialist, Asia Pacific. haf.saba@netiq.com 6
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 informationTroubleshooting 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 informationFundamentals of VoIP Call Quality Monitoring & Troubleshooting. 2014, SolarWinds Worldwide, LLC. All rights reserved. Follow SolarWinds:
Fundamentals of VoIP Call Quality Monitoring & Troubleshooting 2014, SolarWinds Worldwide, LLC. All rights reserved. Introduction Voice over IP, or VoIP, refers to the delivery of voice and multimedia
More informationEnsuring IP Telephony Performance Through Remote Monitoring
Ensuring IP Telephony Performance Through Remote Monitoring A By Introduction The advantages of IP Telephony are well-known, among them network consolidation, centralized voice administration, longdistance
More information--------- Virtual Office. Network Tests. Revision 1.0. 8x8, Inc. 2125 O'Nel Drive San Jose, CA 95131 Phone: 408.727.1885 Fax: 408.980.
--------- Virtual Office Network Tests Revision 1.0 8x8, Inc. 2125 O'Nel Drive San Jose, CA 95131 Phone: 408.727.1885 Fax: 408.980.0432 8x8, Inc. 2125 O'Nel Drive San Jose, CA 95131 Phone: 408.727.1885
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 informationApplication Note. Pre-Deployment and Network Readiness Assessment Is Essential. Types of VoIP Performance Problems. Contents
Title Six Steps To Getting Your Network Ready For Voice Over IP Date January 2005 Overview This provides enterprise network managers with a six step methodology, including predeployment testing and network
More informationOneSight Voice Quality Assurance
OneSight Voice Quality Assurance Benefits Proactively determine voice quality issues as well as other service impacting issues before users complain Comprehensively monitor communications systems with
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 informationCiscoWorks Internetwork Performance Monitor 4.0
CiscoWorks Internetwork Performance Monitor 4.0 Product Overview The CiscoWorks Internetwork Performance Monitor (IPM) is a network response-time and availability troubleshooting application. Included
More information--------- Virtual Office Network Tests Version 2.0 Revision 1.0 8x8, Inc. 2125 O'Nel Drive San Jose, CA 95131 Phone: 408.727.1885 Fax: 408.980.
--------- Virtual Office Network Tests Version 2.0 Revision 1.0 8x8, Inc. 2125 O'Nel Drive San Jose, CA 95131 Phone: 408.727.1885 Fax: 408.980.0432 Contents Important Notes for all Tests... 3 Tests and
More informationCustomer Network Assessment
--------- Customer Network Assessment Network Tests Version 2.0 Revision 1.0 8x8, Inc. 2125 O'Nel Drive San Jose, CA 95131 Phone: 408.727.1885 Fax: 408.980.0432 Contents Important Notes for all Tests...
More informationTesting VoIP on MPLS Networks
Application Note Testing VoIP on MPLS Networks Why does MPLS matter for VoIP? Multi-protocol label switching (MPLS) enables a common IP-based network to be used for all network services and for multiple
More informationQuality of Service (QoS) and Quality of Experience (QoE) VoiceCon Fall 2008
Quality of Service (QoS) and Quality of Experience (QoE) VoiceCon Fall 2008 John Bartlett NetForecast, Inc. john@netforecast.com www.netforecast.com VoIP Deployment Realities VoIP is not just another application
More informationMonitoring Your IP Telephony Network
Monitoring Your IP Telephony Network A By Introduction The advantages of IP Telephony are well-known, among them network consolidation, centralized voice administration, longdistance toll savings and unified
More informationUsing the ClearSight Analyzer To Troubleshoot the Top Five VoIP Problems And Troubleshooting Streaming Video
Using the ClearSight Analyzer To Troubleshoot the Top Five VoIP Problems And Troubleshooting Streaming Video With the prevalence of Voice over IP applications within the enterprise, it is important to
More informationTroubleshooting VoIP and Streaming Video Problems
Using the ClearSight Analyzer to troubleshoot the top five VoIP problems and troubleshoot Streaming Video With the prevalence of Voice over IP and Streaming Video applications within the enterprise, it
More informationIP Office Technical Tip
IP Office Technical Tip Tip no: 195 Release Date: October 26, 2007 Region: GLOBAL Using Packet Capture Software To Verify IP Network VoIP Quality Of Service (QoS) Operation Converged networks can experience
More informationVoice 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 informationKnowledge Is Power: Do what s best for the client.
Knowledge Is Power: Do what s best for the client. 1. Understanding Voice and Data Differences Even when they are carried on the same network, voice traffic and data traffic cannot be handled the same
More informationDiagnosing the cause of poor application performance
Diagnosing the cause of poor application performance When it comes to troubleshooting application performance issues, there are two steps you can take to make diagnosis easier, faster and more accurate.
More informationAvaya ExpertNet Lite Assessment Tool
IP Telephony Contact Centers Mobility Services WHITE PAPER Avaya ExpertNet Lite Assessment Tool April 2005 avaya.com Table of Contents Overview... 1 Network Impact... 2 Network Paths... 2 Path Generation...
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 informationService Level Agreements for VoIP Alan Clark CEO, Telchemy
Service Level Agreements for VoIP Alan Clark CEO, Telchemy 1 Agenda VoIP SLAs What s typical Why typical isn t ok Approaches to SLA measurement What to measure The trust problem Final thoughts 2 What is
More informationNortel - 920-803. Technology Standards and Protocol for IP Telephony Solutions
1 Nortel - 920-803 Technology Standards and Protocol for IP Telephony Solutions QUESTION: 1 To achieve the QoS necessary to deliver voice between two points on a Frame Relay network, which two items are
More informationIP SLAs Overview. Finding Feature Information. Information About IP SLAs. IP SLAs Technology Overview
This module describes IP Service Level Agreements (SLAs). IP SLAs allows Cisco customers to analyze IP service levels for IP applications and services, to increase productivity, to lower operational costs,
More informationChapter 02. Diagnostics & Troubleshooting
Chapter 02 Diagnostics & Troubleshooting Chapter 02 Module 01 Using Diagnostic Tools Module Introduction This module provides information about Avaya provided diagnostic tools. After completing this module
More informationTechnical white paper Troubleshooting the top VoIP call quality issues
Technical white paper Troubleshooting the top VoIP call quality issues By Sue Bradshaw Technology Writer The top issues affecting VoIP call quality are often not caused by the application itself, but are
More informationAbstract. Avaya Solution & Interoperability Test Lab
Avaya Solution & Interoperability Test Lab Application Notes for Configuring a Virtual Private Network (VPN) for Avaya IP Office using the Edgewater Networks EdgeMarc 4500 VoIP VPN Appliance - Issue 1.0
More informationVoice 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 informationCISCO IOS IP SERVICE LEVEL AGREEMENTS: ASSURE THE DELIVERY OF IP SERVICES AND APPLICATIONS
CISCO IOS IP SERVICE LEVEL AGREEMENTS: ASSURE THE DELIVERY OF IP SERVICES AND APPLICATIONS INTERNET TECHNOLOGIES DIVISION JANUARY 2005 1 Cisco IOS IP Service Level Agreements Presentation Agenda Overview
More informationGetting Started with. Avaya TM VoIP Monitoring Manager
Getting Started with Avaya TM VoIP Monitoring Manager Contents AvayaTM VoIP Monitoring Manager 5 About This Guide 5 What is VoIP Monitoring Manager 5 Query Endpoints 5 Customize Query to Filter Based
More informationGetting Started with VoIP Reports
With ehealth VoIP, you have a powerful system for monitoring and managing your Voice over IP (VoIP) configuration. ehealth reports provide the information you need to answer these questions: Is the VoIP
More informationAchieving Service Quality and Availability Using Cisco Unified Communications Management Suite
Achieving Service Quality and Availability Using Cisco Unified Communications Management Suite EXECUTIVE SUMMARY CISCOLIVE Europe 2010 Annual Cisco IT and communications conference Event held at Barcelona,
More informationData Center Real User Monitoring
Data Center Real User Monitoring Integration with Cisco NAM Getting Started Release 12.1 Please direct questions about Data Center Real User Monitoring or comments on this document to: APM Customer Support
More informationTroubleshooting Your VoIP Ecosystem with Prognosis Sue Bradshaw, Technology Writer
White Paper Troubleshooting Your VoIP Ecosystem with Prognosis Sue Bradshaw, Technology Writer This white paper from Integrated Research discusses how managing the complete VoIP ecosystem with Prognosis
More informationThe Importance of Proactive Network Management in Skype for Business
July 15 The Importance of Proactive Network Management in Skype for Business Michael F. Finneran How customers should consider Nectar s UC Management Platform components to support Skype for Business deployments
More informationHosted Voice. Best Practice Recommendations for VoIP Deployments
Hosted Voice Best Practice Recommendations for VoIP Deployments Thank you for choosing EarthLink! EarthLinks best in class Hosted Voice phone service allows you to deploy phones anywhere with a Broadband
More informationManaging ^ VoIP Quality and Performance
Unified, Cloud Based, Virtualized, Hosted Managing ^ VoIP Quality and Performance Alan Clark, CEO Telchemy alan.d.clark@telchemy.com 1 Outline VoIP Performance Issues Current state of the art VoIP performance
More informationRouting & Traffic Analysis for Converged Networks. Filling the Layer 3 Gap in VoIP Management
Routing & Traffic Analysis for Converged Networks Filling the Layer 3 Gap in VoIP Management Executive Summary Voice over Internet Protocol (VoIP) is transforming corporate and consumer communications
More informationDiagnosing the cause of poor application performance
Diagnosing the cause of poor application performance When it comes to troubleshooting application performance issues, there are two steps you can take to make diagnosis easier, faster and more accurate.
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 informationBusiness case for VoIP Readiness Network Assessment
Business case for VoIP Readiness Network Assessment Table of contents Overview... 2 Different approaches to pre-deployment assessment:.......... 2 Other considerations for VoIP pre-deployment... 3 The
More informationVegaStream Information Note Considerations for a VoIP installation
VegaStream Information Note Considerations for a VoIP installation To get the best out of a VoIP system, there are a number of items that need to be considered before and during installation. This document
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 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 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 informationActive 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 informationEncapsulating 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 informationModule10. Monitoring. MVA Jump Start
Module10 Monitoring MVA Jump Start Module Overview Voice Quality Concepts Exploring Lync Monitoring Server Components Exploring Lync Monitoring Server Reports RTP and RTCP Collected Information Lesson
More informationPerform: Monitor to Assure a Great User Experience
Whitepaper Perform: Monitor to Assure a Great User Experience Introduction IP-based network infrastructures provide many benefits. They open the door to creating a Unified Communications (UC) environment
More informationThis topic lists the key mechanisms use to implement QoS in an IP network.
IP QoS Mechanisms QoS Mechanisms This topic lists the key mechanisms use to implement QoS in an IP network. QoS Mechanisms Classification: Each class-oriented QoS mechanism has to support some type of
More informationQoS:What Is It? Why Do We Need It?
Expert Reference Series of White Papers QoS:What Is It? Why Do We Need It? 1-800-COURSES www.globalknowledge.com QoS:What Is It? Why Do We Need It? Berni Gardiner, Certified Cisco Instructor, CCNA, CCDA,
More informationTechnote. SmartNode Quality of Service for VoIP on the Internet Access Link
Technote SmartNode Quality of Service for VoIP on the Internet Access Link Applies to the following products SmartNode 1000 Series SmartNode 2000 Series SmartNode 4520 Series Overview Initially designed
More informationMonitoring 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 informationAccess the Test Here http://myspeed.visualware.com/index.php
VoIP Speed Test Why run the test? Running a VoIP speed test is an effective way to gauge whether your Internet connection is suitable to run a hosted telephone system using VoIP technology. A number of
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 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 informationSecurity and the Mitel Networks Teleworker Solution (6010) Mitel Networks White Paper
Security and the Mitel Networks Teleworker Solution (6010) Mitel Networks White Paper Release 2 October 2003 Copyright Copyright 2003 Mitel Networks Corporation. This document is unpublished and the following
More informationApplication Notes. Performance Management & Enterprise IP Telephony. Introduction. Contents. Managing Enterprise IP Telephony. Series.
Application Notes Series Date Nov 2014 Overview Managing Enterprise IP Telephony Voice over IP Performance Management This Application Note describes typical issues that network managers encounter when
More informationHOSTED VOICE Bring Your Own Bandwidth & Remote Worker. Install and Best Practices Guide
HOSTED VOICE Bring Your Own Bandwidth & Remote Worker Install and Best Practices Guide 2 Thank you for choosing EarthLink! EarthLinks' best in class Hosted Voice phone service allows you to deploy phones
More informationHow To Understand The Differences Between A Fax And A Fax On A G3 Network
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 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 informationTroubleshooting LANs with Wirespeed Packet Capture and Expert Analysis
Application Note Troubleshooting LANs with Wirespeed Packet Capture and Expert Analysis Introduction This application note is one in a series of local area network (LAN) troubleshooting papers from JDSU
More informationConvergence Technologies Professional (CTP) Course 1: Data Networking
Convergence Technologies Professional (CTP) Course 1: Data Networking The Data Networking course teaches you the fundamentals of networking. Through hands-on training, you will learn the vendor-independent
More informationYour new VoIP Network is working great Right? How to Know. April 2012 WHITE PAPER
Your new VoIP Network is working great Right? How to Know April 2012 Executive Summary This paper discusses the importance of measuring and monitoring the voice quality of VoIP calls traversing the data
More informationADDRESSING BANDWIDTH CONSTRAINTS IN THE HOSPITALITY AND SPECIALTY RETAIL INDUSTRIES
ADDRESSING BANDWIDTH CONSTRAINTS IN THE HOSPITALITY AND SPECIALTY RETAIL INDUSTRIES Written By: Vic Herrera, Chief Technology Officer Bandwidth for remote viewing of surveillance data consists of several
More informationMeasuring VoIP QoS. Going Beyond Can You Hear Me Now? Kaynam Hedayat. MPLScon May 2005
Measuring VoIP QoS Going Beyond Can You Hear Me Now? Kaynam Hedayat MPLScon May 2005 Overview Why Real-Time VoIP Quality Assurance Matters? Challenges - Going Beyond Can You Hear Me Now? Monitoring Technologies
More informationSimplify VoIP Network Setup and Troubleshooting with NetTool VoIP
Simplify VoIP Network Setup and Troubleshooting with NetTool VoIP Introduction As businesses search for new ways to cut costs and increase efficiency, they are moving their phone systems to VoIP (voice
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 informationUsing TrueSpeed VNF to Test TCP Throughput in a Call Center Environment
Using TrueSpeed VNF to Test TCP Throughput in a Call Center Environment TrueSpeed VNF provides network operators and enterprise users with repeatable, standards-based testing to resolve complaints about
More informationVoIP / 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 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 informationPlanning Networks for VOIP. An Introduction
Planning Networks for VOIP An Introduction Planning Networks for VOIP Page 2/10 Contents 1 Introduction...3 2 Voice Quality Requirements...3 3 Codecs...4 4 Network Layout...5 5 Planning Capacity...6 5.1
More informationVoice, Video and Data Convergence > A best-practice approach for transitioning your network infrastructure. White Paper
> A best-practice approach for transitioning your network infrastructure White Paper The business benefits of network convergence are clear: fast, dependable, real-time communication, unprecedented information
More informationEXpert Test Tools PLATFORM SOFTWARE TOOLS FOR TESTING IP-BASED SERVICES
PLATFORM SOFTWARE TOOLS FOR TESTING IP-BASED SERVICES Comprehensive triple-play test suite for FTTx/FTTH and commercial deployments. Combines six of the most common IP test tools into one: ping, traceroute,
More informationTraffic Characterization and Perceptual Quality Assessment for VoIP at Pakistan Internet Exchange-PIE. M. Amir Mehmood
Traffic Characterization and Perceptual Quality Assessment for VoIP at Pakistan Internet Exchange-PIE M. Amir Mehmood Outline Background Pakistan Internet Exchange - PIE Motivation Preliminaries Our Work
More informationTest Equipment Depot - 800.517.8431-99 Washington Street Melrose, MA 02176 - TestEquipmentDepot.com. Application Advisor
Test Equipment Depot - 800.517.8431-99 Washington Street Melrose, MA 02176 - TestEquipmentDepot.com NetAlly Application Advisor Monitor End User Experience for Local and Remote Users, Distributed Sites
More informationPreparing Your IP network for High Definition Video Conferencing
White Paper Global Services April 2007 Table of Contents 1.0 OVERVIEW...3 2.0 VIDEO CONFERENCING BANDWIDTH DEMAND...3 3.0 AVAILABLE BANDWIDTH...5 3.1 Converged Network Links... 6 3.2 Dedicated Network
More informationICND2 NetFlow. Question 1. What are the benefit of using Netflow? (Choose three) A. Network, Application & User Monitoring. B.
ICND2 NetFlow Question 1 What are the benefit of using Netflow? (Choose three) A. Network, Application & User Monitoring B. Network Planning C. Security Analysis D. Accounting/Billing Answer: A C D NetFlow
More informationBandwidth Security and QoS Considerations
This chapter presents some design considerations for provisioning network bandwidth, providing security and access to corporate data stores, and ensuring Quality of Service (QoS) for Unified CCX applications.
More informationMeasurement of IP Transport Parameters for IP Telephony
Measurement of IP Transport Parameters for IP Telephony B.V.Ghita, S.M.Furnell, B.M.Lines, E.C.Ifeachor Centre for Communications, Networks and Information Systems, Department of Communication and Electronic
More informationSample Reports - Version 9.0 Business Intelligence & Unified Communications Reporting
Sample Reports - Version 9.0 Business Intelligence & Unified Communications Reporting All information in this document is based upon product specifications available at the time of printing. ISI Telemanagement
More informationVoIP Application Note:
VoIP Application Note: Configure NEC UX5000 w/ BroadVox SIP Trunking Service P/N 0913226 Date: 8/12/09 Table of Contents: GOAL... 3 PREREQUISITES... 3 SIP TRUNKING INFORMATION PROVIDED BY BROADVOX:...
More informationEvaluating 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 informationMicrosoft Lync and SIP trunking - Ensuring multi-vendor technology success with Prognosis
White Paper Microsoft Lync and SIP trunking - Ensuring multi-vendor technology success with Prognosis by Sue Bradshaw: Technology Writer, Integrated Research Ensuring new technology like Lync delivers
More informationIxChariot Pro Active Network Assessment and Monitoring Platform
IxChariot Pro Active Network Assessment and Monitoring Platform Network performance and user experience are critical aspects of your business. It is vital to understand customers perception of your website,
More informationAvaya Diagnostic Server
Avaya Diagnostic Server Benefits of Avaya Diagnostic Server: Resolve issues faster with remote IP Phone testing Reduce the need for costly third party diagnostics equipment and software licensing Self-diagnose
More informationInmarsat TCP Accelerator V2
Inmarsat TCP Accelerator V2 User Guide for WindowsVista, WindowsXP and Windows7 Version 3.0 10 February 2012 inmarsat.com/bgan Whilst the above information has been prepared by Inmarsat in good faith,
More informationComparison 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 informationThis topic describes dial peers and their applications.
Dial Peers What is Dial Peer? This topic describes dial peers and their applications. What is a Dial Peer? A dial peer is an addressable call endpoint. Dial peers establish logical connections, called
More informationQuestion: 3 When using Application Intelligence, Server Time may be defined as.
1 Network General - 1T6-521 Application Performance Analysis and Troubleshooting Question: 1 One component in an application turn is. A. Server response time B. Network process time C. Application response
More informationQoS 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 informationWhitepaper. A Guide to Ensuring Perfect VoIP Calls. www.sevone.com blog.sevone.com info@sevone.com
A Guide to Ensuring Perfect VoIP Calls VoIP service must equal that of landlines in order to be acceptable to both hosts and consumers. The variables that affect VoIP service are numerous and include:
More informationInstallation of the On Site Server (OSS)
Installation of the On Site Server (OSS) rev 1.1 Step #1 - Initial Connection to the OSS Having plugged in power and an ethernet cable in the eth0 interface (see diagram below) you can connect to the unit
More informationBest Practices for Planning, Deploying and Managing Enterprise VoIP
Best Practices for Planning, Deploying and Managing Enterprise VoIP April 2008 Introduction Voice over IP (VoIP) technology has matured rapidly since its inception roughly 10 years ago. Based on this maturity,
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 informationConfiguring H.323 over Port Network Address Translation (PNAT) for Avaya IP Endpoints using the Avaya SG200 Security Gateway - Issue 1.
Configuring H.323 over Port Network Address Translation (PNAT) for Avaya IP Endpoints using the Avaya SG200 Security Gateway - Issue 1.0 Abstract These Application Notes describe how to configure the Avaya
More informationYour Guide to Troubleshooting VoIP
Your Guide to Troubleshooting VoIP VoIP s extreme sensitivity to delay and packet loss compared to other network applications such as web and e-mail services, presents a real challenge. A basic understanding
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 information