Overview
A hands on course covering IP telephony with SIP. The course starts with a brief review of knowledge students should already possess including RTP and RTCP. The main focus is on SIP though, progressing from what SIP is through SIP signalling, call processing and architectures, moving onto more advanced issues including security, multimedia, and interoperability. Hands-on practicals follow each major theory session.
Prerequisites
Delegates will learn how to
By the end of the course delegates will be able to:
- Explain how SIP works.
- Analyse SIP packets.
- Deploy SIP IP telephony solutions.
- Integrate SIP with other telephony solutions.
Outline
VoIP review
What is VoIP? Brief review of IP, Brief review of telephones and voice. RTP, payload type, RTP timestamps, RTCP, mixers and translators.
Hands on Softphone configuration, analysing RTP packets.
What is SIP?
Why SIP? SIP history, SIP standards, SIP protocol stack, SIP relationship with other protocols, SIP functions, SIP capabilities, initial SIP phone startup, how SIP works, and a basic SIP call.
Hands on Peer to peer SIP. Video calls.
SIP messages
SIP sessions, SIP flows, Message structure, Core SIP methods: INVITE, ACK, BYE, CANCEL, OPTIONS, REGISTER. Extension methods. Response codes. SIP call flows. INVITE message format, SDP in the SIP INVITE.
Hands on Setting up a PBX, analysing SIP packets.
SIP and Wireshark
Capturing packets, display and capture filters for voice, statistics, telephony menu, SIP statistics, call flows, RTP stream analysis.
Hands on Analysing VoIP calls.
SIP architectures
UA client, UA server, Proxy servers, registration, Redirect servers, registrars. SIP phones, gateways, application servers, and other products. Stateful and stateless servers. Various call scenarios.
Hands on SIP proxies. SIP trunks.
SIP addressing
URLs, SIP addresses, registration, Location and Directory servers. Address tracking.
Hands on SIP and DNS.
Supplementary services
SIP signalling, call hold, call transfer, call forwarding, conferences, call control. SUBSCRIBE, NOTIFY, MESSAGE, PRACK.
Hands on Analysing SIP supplementary services.
SIP security
SIPS, SRTP. UAC authentication, VPN, firewalls, NAT problems and SIP. Solving NAT traversal issues, STUN, TURN, ICE Session Border Controllers.
Hands on SIP authentication.
SIP and the PSTN
Inter working with PSTN, ISUP to SIP mapping, SIP-T, SIP and SIGTRAN.
Hands on SIP gateways and trunks.
Frequently asked questions
How can I create an account on myQA.com?
There are a number of ways to create an account. If you are a self-funder, simply select the "Create account" option on the login page.
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Find more answers to frequently asked questions in our FAQs: Bookings & Cancellations page.
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QA online courses, also commonly known as distance learning courses or elearning courses, take the form of interactive software designed for individual learning, but you will also have access to full support from our subject-matter experts for the duration of your course. When you book a QA online learning course you will receive immediate access to it through our e-learning platform and you can start to learn straight away, from any compatible device. Access to the online learning platform is valid for one year from the booking date.
All courses are built around case studies and presented in an engaging format, which includes storytelling elements, video, audio and humour. Every case study is supported by sample documents and a collection of Knowledge Nuggets that provide more in-depth detail on the wider processes.
When will I receive my joining instructions?
Joining instructions for QA courses are sent two weeks prior to the course start date, or immediately if the booking is confirmed within this timeframe. For course bookings made via QA but delivered by a third-party supplier, joining instructions are sent to attendees prior to the training course, but timescales vary depending on each supplier’s terms. Read more FAQs.
When will I receive my certificate?
Certificates of Achievement are issued at the end the course, either as a hard copy or via email. Read more here.