Telco technical

& business courses

available worldwide

VoLTE Overview

network engineers
available worldwide
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Who Should Attend?

This training is an excellent choice for engineers and managers who are already familiar with LTE and are beginning to introduce VoLTE in their network.


Course Scope

  1. Introduction. 
    • LTE.
    • IMS.
    • MMTel.
    • VoLTE.
    • SR-VCC.
    • SCFB & SMSoSGs.
    • RCS. 
  2. LTE Overview. 
    • Network Structure.
    • Attach Procedure.
    • Default and Dedicated Bearer.
    • PCRF Usage.
    • QoS Parameters.
    • Efficient Handling of VoIP in E-UTRAN – SPS, DRX, DTX.
    • Fast Re-transmissions.
    • Link Adaptation.
    • AMR-NB and AMR-WB Speech Coder.
    • Fast Signalling.
    • Service Continuity. 
  3. IMS Overview. 
    • IMS Architecture Components.
    • Application Servers.
    • Addressing and Routing Principles.
    • IMS Registration.
    • IPX.
    • Security.
    • Number Portability. 
  4. Voice Call. 
    • Mobile-to-Mobile Call.
    • Interworking with CS Systems – Calls Between VoLTE and CS Terminals.
    • Coexistence of VoLTE and CSFB – T-ADS. 
  5. Supplementary Services. 
    • MMTel and VoLTE Supplementary Services.
    • Synchronisation of Subscriber Profiles Between CS and IMS Domains.
    • Examples of Supplementary Service Procedures. 
  6. SMS. 
    • SMSoIP Service Architecture.
    • SMS Transfer.
    • Integration with SMS Router. 
  7. SR-VCC. 
    • SR-VCC Handover from LTE to 2G/3G CS Network.
    • SR-VCC Service Architecture.
    • SR-VCC Related Identities. 
  8. CSFB and SMSoSGs. 
    • Traditional CS Services in LTE without VoLTE Support.
    • CSFB and SMSoSGs as the Intermediate Solution for Roaming Subscribers and Emergency Calls. 
  9. Security. 
    • 3GPP & IMS Authentication and Key Agreement.
    • Ciphering.
    • Generic Authentication Architecture. 
  10. Emergency Calls. 
    • Emergency Service Categories.
    • Domain Selection for Emergency Call Set-up.
    • Architecture.
    • Emergency Registration.
    • Geographical Positioning. 
  11. Roaming, Interconnect, Charging & Accounting. 
    • LBO.
    • IBCF.
    • TrGW.
    • BGCF.
    • Charging Architecture.
    • Offline and Online Charging.

Course Objectives

VoLTE Overview is an intermediate level technical training focused on GSMA IR.92 IMS Profile for Voice and SMS over LTE. VoLTE is presented in the broad context of existing multi-RAT mobile systems. Hence, the training explains not only IMS architecture and procedures but also integration of VoLTE with the existing network infrastructure and services (including CSFB and SMSoSGs).



The participants should be familiar with basic aspects of mobile network architecture and services. Background knowledge of LTE is highly recommended.


Training Structure

Two-day training divided into logical sessions.



Instructor-led training. Lectures and multimedia presentations.

Great teacher with deep knowledge and experience.

Mr. Philippe Wrzecionek, TATA

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

Ms. Ledia Meici, AMC Albania

I can proudly recommend these courses for others as well.

Mr. Tarvo Jammer, Elisa Estonia

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

Mr. Omar El-Fiky, Vodafone Egypt

More than excellent course!

Ms. Inessa Mijiferjyan, Vivacell

Perfect course.

Mr. Arseniy Mazanik, Beeline Russia

The training is completely excellent.

Mr. Philipp Korostelev, Beeline Moscow

Overwhelming knowledge and expertise. Interactive and enjoyable learning.

Mr. Ashish Shrestha, NCell Nepal

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

Mr. Mouin Al Saghir, Vivacell

A clear picture of GSM switching and signalling.

Ms. Anette Chale, mCel Mozambique

The course exceeded my expectations. Hats off!

Mr. Adnan Syed, Mobily

Experienced trainer. Excellent descriptions.

Mr. Ahmad Doar, Mobily, KSA

Good direct connection between course material and real problems.

Mr. Alex Konstantopoulos, Cosmote, GR

Training was above expectations!

Mr. Ariel Haxhiu, Eagle Mobile, AL

Regardless of technology I received theoretical and practical answers.

Mr. Kosta Pribić, T-Mobile Croatia

A lot of useful materials and knowledge.

Mr. Shukhrat Khaydar, UCell

This course will be very useful in my daily work.

Mr. Leopoldino Ferreira, Unitel Angola

The trainer is capable of answering all my questions.

Ms. Ana Gheorghe, Vodafone RO

The best training ever.

Mr. Timur Zagretdinov, MTT Russia

Excellent course and instructor.

Mr. Nikolay Suetin, Beeline Russia

Excellent, knowledgeable trainer, open to communication.

Mr. Dmitrii Kropotov, Tele2 Russia

Training provides useful methods to analyze real protocols.

Mr. Seema Karn, NCell Nepal

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

Ms. Pinelopi Tragoudara, Vodafone GR

Trainer adapted to the expectations of the audience.

Mr. Antoine Blanchet, Monaco Telecom

Good class notes and great examples.

Mr. Ghaffar Masood, Mobilink Pakistan

The course covers all the impacted areas.

Ms. Gratia Scanteie, Vodafone, RO

Trainer understands local market experience.

Mr. Andrew Sweetman, Wataniya

Very effective training methods.

Ms. Erjona Xhemali, AMC Albania

Very clear explanations.

Ms. Tatyana Krasyuk, Life Ukraine

Professional, high-quality trainer.

Mr. Gagik Shatveryan, Vivacell

Excellent knowledge from the trainer.

Ms. Catherine Barman, Swisscom

A good approach to a complex problem.

Ms. Horia Catrinoiu, Vodafone RO

Trainer understands local market experience.

Mr. Andrew Sweetman, Wataniya

Trainers have passion to teach & impart knowledge.

Mr. Kanchan Chitrakar, Ncell Nepal

Everyone gets individual attention from the trainer.

Ms. Inga Tomsone, Tele2 Latvia

Deep and detailed topic analysis.

Mr. Mohamed Sabry, Vodafone Egypt

Trainer was able to answer practical questions.

Mr. Daniel Krolikowski, Play Poland

Really practical and very fruitful training.

Mr. Niroj Raya, NCell Nepal

The whole course was very valuable.

Mr. Sayyid Ali, Dhiraagu Maldives

Excellent exercises!

Mr. Muhammad Ali, Mobilink Pakistan

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

Ms. Viktoriya Gusarova, Beeline RU

The training exceeded my expectations.

Ms. Irida Gjashta, AMC Albania

Very well organized training programmes.

Mr. Mihnea Teodorescu, Cosmote, RO

Course covers all important issues and presents relevant examples.

Mr. Mohamed Kamel, Vodafone Egypt

Amazing, more than excellent, audience-oriented trainer.

Mr. Evgeniy Dmitriev, Astelit Ukraine

Good logical structure of the course and explanation.

Ms. Elena Shevtsova, Beeline, KZ

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

Mr. Arben Shabani, PTK Kosovo

Experienced trainer. Real cases with references to recommendations.

Mr. David Curkan, T-Mobile Croatia

Trainer is open for comments and discussion.

Ms. Natalya Nerubenko, Life Ukraine

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

Ms. Olga Rudnicka, Tele2 Latvia

Unique training covering the most important areas of my work.