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Definitive VoIP for engineers

A 3 day
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.

Key outcomes from this course

By the end of the course delegates will be able to:
  • 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

Who will benefit:
Anyone working in the field of networking or telecommunications.
Intro to data communications & networking
TCP/IP fundamentals.
3 days

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.

Overall ratings for this course:

Course review

"This course gives a good overall introduction to VoIP and SIP and covers several related topics."
M. B. SSE Telecomms
"Good basic introduction to VoIP."
N. A. Selex Communications

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.

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

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.

Why Choose Us

SNT trainers score an average of over 90% on the three main areas of:
  • Ability to teach
  • Technical knowledge
  • Answering questions
“Excellently presented by a very knowledgeable and enthusiastic trainer.” P.D. General Dynamics

We limit our maximum class size to 8 delegates; often we have less than this. This ensures optimal interactivity between delegates and instructor.
"Excellent course. The small class size was a great benefit…" M.B. IBM

We write our own courses; courseware does not just consist of slides and our slides are diagrams not bullet point text. A typical chapter provides clearly defined objectives with a chapter overview, slides with text underneath, a quiz at the end to check the learning of the students. Hands on exercises are at the end and are used to reinforce the theory.

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