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Definitive VoIP for engineers  |    A 3 day   hands on   training course

VoIP training course description

Convergence of voice and data is now a common place mainstream technology. Our Voice Over IP course investigates the characteristics of voice transmission and then studies the impact on IP networks. Practical sessions with soft phones, hard phones and gateways allow the students to see all aspects of VoIP. Network analysers are used to study packets on the wire.

What will you learn
  • Describe the issues of voice and data convergence.
  • Describe techniques, which can be used in IP to provide low uniform delay.
  • Evaluate VoIP technologies.
  • Design data networks, which will support voice.
VoIP training course details

VoIP training course contents

  • What is VoIP
  • Voice over IP, brief review of IP, brief review of telephones and voice.

  • Configuring IP softphones
  • What are softphones? Downloading, installing.
    Hands on Building the base IP network, a simple VoIP call with softphones, Internet telephony.

  • Addressing
  • E164, FQDN, IP addresses, URIs, DNS, SIP addressing, H.323 addressing.

  • VoIP issues
  • Bandwidth, Delay, Jitter, digitising voice, digitisation steps, coding, quality issues, MOS, voice compression, silence suppression, packetising voice, prioritising voice, jitter buffers.
    Hands on Simple packet analysis.

  • Architectures
  • Desktop, backbone, gateway, hard phones, PoE, integrating phones and PCs, carriers, Softswitches.
    Hands on Integrating Softphones, hard phones and analog phones.

  • IP performance and QoS
  • ITU delay recommendations, IP DSCP field, DiffServ, IP precedence, queuing strategies; FIFO, WFQ, custom, priority, RED, LLQ.

  • VoIP protocol stack
  • RTP, RTCP, mixers and translators, RSVP. Bandwidth, Erlang models, link layer overhead.
    Hands on Calculating VoIP bandwidth, analysing RTP packets.

  • ITU Recommendation H.323
  • Architecture, protocols, terminals, Call setup, Gatekeepers, gateway discovery, H.323 registration with a gatekeeper.
    Hands on PC to PC using H.323.

  • IETF – Session Initiation Protocol
  • What is SIP? SIP protocol stack, SDP, Sip architecture, SIP messages, Initial SIP phone startup, SIP servers, proxy server, redirect server.
    Hands on PC to PC using SIP.

  • Carrier networks
  • Signalling systems, SS7, media gateways, Media gateway controllers, signalling gateways, MGCP, Megaco, SIGTRAN.
    Hands on PSTN interworking.

  • Video over IP
  • Video components, digital video, pictures and audio, video codecs, issues and solutions, video conferencing, multipoint video conferencing, video protocol stack.

  • Appendix 1: Multicasting.
  • Appendix 2: Voice/data integration without IP.

Learning path



Based on customer ratings

P. B. - CGG Veritas

"Very good instruction. Kept classes interesting and fun."

T. B. - BAE Systems

"The course gave the required amount of information and was very well presented."

Training approach

This structured training course seeks to build upon workbook learning through the use of group exercises, dynamic discussion and individual tasks in order to deliver an engaging and interactive module that will ensure all candidates are able to transfer their new skills into the workplace.