Definitive VoIP for engineers

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

VoIP training course details

Anyone working in the field of networking or telecommunications.

TCP/IP foundation for engineers
Intro to data communications & networking

3 days

Voice over IP, brief review of IP, brief review of
telephones and voice.

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.

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

RTP, RTCP, mixers and translators, RSVP.
Bandwidth, Erlang models, link layer overhead.

Hands on Calculating VoIP bandwidth, analysing
RTP packets.

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

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 components, digital video, pictures and
audio, video codecs, issues and solutions, video
conferencing, multipoint video conferencing, video
protocol stack.