Telco technical

& business courses

available worldwide


core engineers
available worldwide
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Who Should Attend?

This course is intended for anyone who needs to broaden his/her knowledge about VoIP technology. This 4-day session gives the participants deep understanding and practical knowledge of SIP, and VoIP related protocols.

Course Scope

  1. VoIP Background.
    • VoIP—Benefits and Problems.
    • Circuit-switching vs. Packet-switching for Real-time Services.
    • Voice Service Quality and Measurement Standards (MOS, etc.).
    • Real-time Services in ATM, Frame Relay, and IP Networks (RTP/RTCP).
    • Voice Compression (Linear Prediction, G.72x codecs) and Packetisation.
    • VoIP Signalling Overview (Call Control, Media Negotiations, Mobility Management).
    • VoIP Standards Evolution.
    • H.32x Standards Overview.
    • H.248 Overview.
    • SIP Overview, History, Standard Evolution.
  2. SIP Fundamentals.
    • SIP Main Architecture.
    • SIP Components (servers and clients) and Their Functions; SIP User Agents (AU client and server).
    • SIP Servers: Proxy (stateful and stateless), Redirect, and Registrar.
    • SIP Location Servers.
    • SIP Gateways
    • SIP Message Structure.
    • SIP Requests and Response Codes.
    • SIP Supporting IETF Protocols (SAP, SDP).
    • SIP Sessions: Setup, Proxying and Redirecting Requests, Address Resolution, and Media Negotiation via SDP.
    • SIP Security.
    • General SIP Message Flow (examples).
  3. Transport Protocols in VoIP Networks.
    • IP4 vs. IP6.
    • RTP and RTCP Protocols.
    • Secured Media Transport—SRTP Protocol.
    • Media Streaming—RTSP Protocol.
  4. Aspects of Voice Coding.
    • Basic Information about Speech; Narrowband Coding.
    • Speech Codecs, Basic Facts, and Speech Compression.
    • PCM, ADPCM, and CELP codecs; Key Differentiators for Codecs Used in VoIP.
  5. Quality of Service in VoIP.
    • Quality of Voice and Service Expectations.
    • Media quality; Key Facts.
    • Speech QoS—Sources of Network Impairments.
    • QoS Measure: MOS, PESQ Model, E Model.
    • QoS Testing Methods.
  6. VoIP Usage in Mobile Networks—IMS System.
    • Architecture.
    • Call Session Control Function (CSCF).
    • HSS & SLF.
    • SIP—Multimedia Session Set-up.
    • P-CSCF Discovery.
    • IMS Registration.
    • IMS Session Set-up (MO).
    • Authorisation of QoS Resources.
    • IDs of IP Multimedia Flows.
    • SIP Forking.
    • Policy and Charging Control.

Course Objectives

This course teaches the participants the workings of new VoIP technology, the architectures used to offer services based on VoIP, and problems stemming from deploying real-time service in packet networks.


None. Basic IP knowledge recommended.

Training Structure

Four-day training divided into logical sessions.


Instructor-led training.

Training was above expectations!

Mr. Ariel Haxhiu, Eagle Mobile, AL

Many different people from different operators can share their problems and ideas.

Mr. Omar El-Fiky, Vodafone Egypt

Training provides useful methods to analyze real protocols.

Mr. Seema Karn, NCell Nepal

The training is completely excellent.

Mr. Philipp Korostelev, Beeline Moscow

Trainer adapted to the expectations of the audience.

Mr. Antoine Blanchet, Monaco Telecom

Really practical and very fruitful training.

Mr. Niroj Raya, NCell Nepal

Excellent exercises!

Mr. Muhammad Ali, Mobilink Pakistan

Trainer understands local market experience.

Mr. Andrew Sweetman, Wataniya

The training exceeded my expectations.

Ms. Irida Gjashta, AMC Albania

Professional, high-quality trainer.

Mr. Gagik Shatveryan, Vivacell

Seminar entirely for Telecommunication operators. A lot of issues covered.

Ms. Pinelopi Tragoudara, Vodafone GR

I feel like the trainer is the best professor and mentor one can have.

Ms. Ledia Meici, AMC Albania

Everyone gets individual attention from the trainer.

Ms. Inga Tomsone, Tele2 Latvia

Excellent knowledge from the trainer.

Ms. Catherine Barman, Swisscom

Trainer was able to answer practical questions.

Mr. Daniel Krolikowski, Play Poland

Experienced trainer. Excellent descriptions.

Mr. Ahmad Doar, Mobily, KSA

Excellent, knowledgeable trainer, open to communication.

Mr. Dmitrii Kropotov, Tele2 Russia

Very well organized training programmes.

Mr. Mihnea Teodorescu, Cosmote, RO

Course covers all important issues and presents relevant examples.

Mr. Mohamed Kamel, Vodafone Egypt

The best training ever.

Mr. Timur Zagretdinov, MTT Russia

Overwhelming knowledge and expertise. Interactive and enjoyable learning.

Mr. Ashish Shrestha, NCell Nepal

Excellent methodology of teaching. Simple and easy to understand training.

Mr. Arben Shabani, PTK Kosovo

A lot of useful materials and knowledge.

Mr. Shukhrat Khaydar, UCell

Trainer is open for comments and discussion.

Ms. Natalya Nerubenko, Life Ukraine

Trainers have passion to teach & impart knowledge.

Mr. Kanchan Chitrakar, Ncell Nepal

Amazing, more than excellent, audience-oriented trainer.

Mr. Evgeniy Dmitriev, Astelit Ukraine

Highly professional trainer with lots of practical experience. Friendly and open.

Ms. Olga Rudnicka, Tele2 Latvia

The course covers all the impacted areas.

Ms. Gratia Scanteie, Vodafone, RO

Perfect course.

Mr. Arseniy Mazanik, Beeline Russia

Experienced trainer. Real cases with references to recommendations.

Mr. David Curkan, T-Mobile Croatia

A good approach to a complex problem.

Ms. Horia Catrinoiu, Vodafone RO

I received a lot of useful information which I use in my work every day.

Ms. Viktoriya Gusarova, Beeline RU

Good class notes and great examples.

Mr. Ghaffar Masood, Mobilink Pakistan

I can proudly recommend these courses for others as well.

Mr. Tarvo Jammer, Elisa Estonia

The trainer is capable of answering all my questions.

Ms. Ana Gheorghe, Vodafone RO

Good logical structure of the course and explanation.

Ms. Elena Shevtsova, Beeline, KZ

Very clear explanations.

Ms. Tatyana Krasyuk, Life Ukraine

More than excellent course!

Ms. Inessa Mijiferjyan, Vivacell

Trainer understands local market experience.

Mr. Andrew Sweetman, Wataniya

Regardless of technology I received theoretical and practical answers.

Mr. Kosta Pribić, T-Mobile Croatia

Great teacher with deep knowledge and experience.

Mr. Philippe Wrzecionek, TATA

The whole course was very valuable.

Mr. Sayyid Ali, Dhiraagu Maldives

Deep and detailed topic analysis.

Mr. Mohamed Sabry, Vodafone Egypt

Good direct connection between course material and real problems.

Mr. Alex Konstantopoulos, Cosmote, GR

I am very impressed with the trainer's knowledge and experience.

Mr. Mouin Al Saghir, Vivacell

Very effective training methods.

Ms. Erjona Xhemali, AMC Albania

The course exceeded my expectations. Hats off!

Mr. Adnan Syed, Mobily

Unique training covering the most important areas of my work.

Mr. Eldar Mursaqulov, Azercell

This course will be very useful in my daily work.

Mr. Leopoldino Ferreira, Unitel Angola

Excellent course and instructor.

Mr. Nikolay Suetin, Beeline Russia

A clear picture of GSM switching and signalling.