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Voice over IP: Hands-On

Course: 461   Type: Hands-On   Duration: 4 Days
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You Will Learn How To

  • Obtain the maximum benefit from Voice over IP (VoIP) and voice/video/data integration
  • Identify the costs, benefits and challenges of VoIP in multivendor networks
  • Interpret H.323, SIP and other industry standards for VoIP
  • Configure Session Initiation Protocol (SIP) IP phones, software phones and SIP IP PBX
  • Engineer high Quality-of-Service VoIP networks
  • Design networks to carry mixed voice, video and data traffic

Course Benefits

Voice over IP reduces your telephony costs and provides unique opportunities for integrating voice, video and data. In this course, you identify challenges and benefits of VoIP integration. 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, take advantage of VoIP for new and innovative applications, and configure and operate SIP and H.323 for VoIP.

Who Should Attend

Anyone interested in migrating voice and video conferencing traffic to new or existing data networks. A basic understanding of either TCP/IP internetworking or telephony concepts is assumed.

Hands-on Training
Exercises provide you with practical experience in key aspects of Voice over IP technology and include:

  • Configuring IP softphones with voice, video & messaging
  • Conferencing with H.323 and SIP protocols
  • Measuring the effect of codecs on network bandwidth consumption
  • Configuring IP desk phones
  • Calculating the degradation in voice quality due to packet loss, delay and jitter
  • Configuring analog phones with SIP analog telephone adapters (gateways) and SIP IP PBX
  • Engineering a network to carry VoIP using Erlang charts

Course Content
Introduction to VoIP
Traditional voice and data networks
  • The Public Switched Telephone Network
  • Packet-switched data networks
  • OSI and IETF reference models
Realising the benefits of VoIP
  • Using data networks to transmit voice and video traffic
  • Taking advantage of new communications features available with SIP and H.323
Applying VoIP Fundamentals
Defining multimedia conferences
  • Voice, video, data and mixed conversions
  • Key VoIP hardware and software components
  • Gateways and gatekeepers
  • Signalling & data protocols
Deploying H.323 or SIP within your organisation
  • SIP vs. H.323
  • Configuring and testing SIP IP PBX and IP phones
  • Setting up voice and video conferencing
  • Creating ring groups for a call center
  • Tuning network quality-of-service for user satisfaction
Analysing H.323 and SIP calls
  • Capturing SIP and H.323 signalling exchanges
  • Implementing and analysing silence suppression
  • In-depth analysis of SIP signalling messages
  • Registering with a gatekeeper or proxy
  • RTCP messages
Leverage SIP for Seamless Communication
Building the IP infrastructure
  • Packetising voice for carriage through the IP network with RTP
  • Employing reliable signalling with TCP
  • Maintaining real-time voice performance with RTP
Analysing VoIP signalling
  • Distinguishing between SIP, H.323, H.225 and H.245
  • Applying SDP to SIP packets
  • Call setup and teardown
Addressing within VoIP networks
  • Mapping phone numbers to IP addresses
  • Gatekeepers, proxies, locations and call servers
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.722, G.723, G.726, G.729
  • Testing for differences in performance
  • Adaptive techniques
  • Voice companding: μ-law, A-law
Open and multivendor systems
  • Anatomy of IP phones
  • Open source Asterisk IP PBX
  • Gateways to the PSTN legacy 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
Minimising 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

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Voice over IP
Course Schedule
16 - 19 Sep, 2008
London
13 - 16 Jan, 2009
London
12 - 15 May, 2009
London

Participants analysing a VoIP signal.
 
The most recent 100 evaluations scored this course at:

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£ 1,695 - Standard Tuition
Savings Plans
£ 980 - 10-Day Training Pass
£ 915 - Flex-Training Passport
£ 1,460 - 10-Training Vouchers
£ 1,560 - 5-Training Vouchers
£ 1,525 - Alumni Gold Tuition

 
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Customer Service or Enrol: 0800 282 353 or +44 1372 364610