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