Voice over IP: Hands-On

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Detailed Overview/Outline

You will learn how to

• Obtain the maximum benefit from Voice over IP (VoIP) and voice/data integration
• Identify the costs, benefits and challenges of VoIP in multivendor networks
• Interpret H.323, SIP and other industry standards for VoIP
• Apply signaling techniques for packet voice services
• Engineer high Quality-of-Service VoIP networks
• Design networks to carry mixed voice and data traffic

Course benefits
Voice over IP reduces your telephony costs and provides unique opportunities for integrating voice and data. To deploy this vital technology successfully, you need to understand its benefits, risks and challenges.

In this course, you gain the knowledge to use a data packet network to provide wide area voice communications. You learn how to ensure Quality of Service for VoIP traffic and how to take advantage of VoIP for new and innovative applications.

Who should attend
This course is valuable for anyone interested in migrating voice traffic to new or existing data networks. A basic understanding of either TCP/IP internetworking or telephony concepts is assumed.

Hands-on training
Exercises throughout this course include:

• Making calls with H.323 and SIP protocols
• Measuring the effect of codecs on network bandwidth consumption
• Calculating the degradation in voice quality due to packet loss, delay & jitter
• Capturing network traffic
• Engineering a network to carry VoIP using Erlang charts
• Configuring IP phones and gateways

Course content
INTRODUCTION TO VoIP

• Traditional voice and data networks
• The Public Switched Telephone Network
• Packet-switched data networks
• OSI and IETF reference models
• Realizing the benefits of VoIP
• Using data networks to efficiently transmit voice traffic
• Cutting the monthly phone bill
• Facilitating e-commerce applications

APPLYING VoIP FUNDAMENTALS

• Defining multimedia conferences
• Voice, video and mixed conversions
• Key conversation components
• Gateways and gatekeepers
• Signaling and data protocols
• Deploying H.323 and Session Initiation Protocol (SIP) within your organization
• SIP vs. H.323
• Making phone-to-phone, desk-to-desk and desk-to-phone calls
• Ports and sockets
• Delivering the best quality
• Analyzing H.323 and SIP calls
• Recording signaling exchanges
• Identifying silence suppression
• Comparing capability exchanges
• Recognizing RTCP exchanges
• Registering with a gatekeeper or proxy

PACKET VOICE ENGINEERING

• Building the IP infrastructure
• Packetizing voice for carriage through IP
• Employing reliable signaling with TCP
• Maintaining real-time voice performance with RTP
• Analyzing VoIP signaling
• Distinguishing between H.225, H.245, H.248, MEGACO and SIP
• Applying SDP to SIP packets
• Call setup and teardown
• Addressing within VoIP networks
• Mapping phone numbers to IP addresses
• Gatekeepers, proxies, location and call servers
• Setting up number mapping services
• Measuring voice quality
• Mean opinion scores (MOS)
• Detecting flaws in transmitted voice
• Grade of service and capacity planning

VOICE QUALITY ENGINEERING

• Classifying factors that affect voice quality
• Encoding voice effectively
• Comparing codecs
• Assessing the effects of delay and loss on quality
• Selecting the best codec
• G.711, G.723, G.726, G.728, G.729
• Testing for differences in performance
• Adaptive techniques
• Voice companding: µ-law, A-law
• Open and multivendor systems
• Anatomy of IP phones
• Interoperating with the phone network
• Capacity planning for voice over packet
• Determining bandwidth needs
• Comparing LAN and WAN performance
• Assessing the impact on data networks

DESIGNING NETWORKS TO CARRY VoIP

• Calculating bandwidth service requirements
• Traffic engineering
• Measuring sporadicity of signals
• Sizing service loading for multisite operation
• Designing VoIP service: case study
• Minimizing delay and delay variation
• Calculating queuing delays
• Sizing link capacity needs and required trunk speeds
• Calculating expected routing delays
• Controlling admission in commercial services
• Employing Random Early Discard (RED)
• Designing for high availability

DELIVERING QUALITY ON REAL NETWORKS

• Exploiting the Internet with VoIP services
• Making calls with IP phones over the Internet
• Providing international voice services
• Linking a call center to the Internet
• Adding VoIP to an e-commerce Web site
• Employing quality services on intranets
• Resource Reservation Protocol (RSVP)
• Configuring IP precedence
• Multiprotocol Label Switching (MPLS)
• Observing the effects of data traffic and fair queuing on voice services
• Mixing voice and data traffic effectively

Sponsor Background:
About Learning Tree

Learning Tree International is a world leader in Hands-on training for Management and Technology Professionals. Since 1974, over 1,700,000 course participants from over 13,000 organizations around the world have enhanced their skills through intensive hands-on exercises under the guidance of expert instructors with real-world experience.

Virtually every major company and government agency has relied on Learning Tree to provide its managers and employees with the skills they need to succeed in their job functions.

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Learning Tree instructors are active practitioners who average more than 20 years experience in their field. Because they use the very technologies and skills they teach, they've already solved the same problems you are likely to encounter, so you and your organization gain the knowledge from their years of hands-on expertise. In addition to their extensive real-world experience, our instructors only qualify to teach Learning Tree Courses after completing our rigorous industryleading screening and training program.

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