J. S., Framestore CFC
B. M., London Internet Exchange
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.
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.
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
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.