VoIP training course description
Convergence of voice and data is now a common place mainstream technology. This 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.
Who will benefit?
Anyone working in the field of networking or telecommunications.
VoIP training course prerequisites
Intro to data communications & networking.
TCP/IP fundamentals.
VoIP training course objectives
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.
Duration: 3 days
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VoIP training
course contents
What is VoIP
What is VoIP, 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 TOS 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.
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