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CS Core Secrets: Mastering 2G, 3G Voice Networks

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  • 444 Students
  • Updated 1/2026
4.3
(126 Ratings)
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Course Information

Registration period
Year-round Recruitment
Course Level
Study Mode
Duration
5 Hour(s) 33 Minute(s)
Language
English
Taught by
Core & IMS Learning
Rating
4.3
(126 Ratings)

Course Overview

CS Core Secrets: Mastering 2G, 3G Voice Networks

Unlock the full potential of CS Core with practical insights into architecture, protocols, and call flows for real-world

Unlock the Power of CS Core Networks: Your Gateway to Telecom Expertise
Dive into the world of CS Core with this comprehensive course designed to make you a master of 2G, 3G voice networks. Whether you're a telecom professional, an engineer, or simply passionate about the field, this course will equip you with in-depth knowledge of CS Core architecture, protocols, signaling, and procedures.

What You’ll Learn:


  • CS Core Fundamentals: Understand the integrated network in 2G, 3G, and 4G.

  • Architectural Insights: Explore the evolution from horizontal to vertical networks and split architectures.

  • Key Nodes & Protocols: Gain mastery of MSC, MGW, HLR, SMSC, and their protocols.

  • Network Identities: Decode IMSI, MSISDN, IMEI, TMSI, and more.

  • Call Flows & Signaling: Master MO/MT call flows, SMS flows, and location updates.

  • Procedures in Action: Learn authentication, ciphering, and roaming updates step-by-step.


Why This Course?

This course combines theoretical clarity with practical insights. You’ll not only learn how CS Core works but also understand its real-world applications in modern telecom systems. With detailed call flow diagrams, real-world examples, and simplified explanations, this course bridges the gap between theory and practice.


Course Duration

This course is around 6 Hours duration.


Mobile CS Voice Core Concepts in 2G GSM, 3G UMTS & 4G-LTE (CSFB)

1.1 CS Core Introduction

1.2 What is the integrated Core Network in 2G, 3G & 4G Network ?

1.3 Difference Between Horizontal & Vertical Core Networks

1.4 High Level view about CS Core Nodes, & used Protocols

1.5 Split Architecture From MSC to MSC-S and MGW

1.6 Access/Radio RF Network Structure

1.7 MSCS | Mobile Switching Center Server

1.8 MGW | Media Gateway

1.9 HLR | Home Location Register

1.10 SMSC | SMS Server

1.11 EIR | Equipment Identity Register

1.12 What is the CS Core Network Identities ?

1.13 IMSI & MSISDN | Mobile Station ISDN Number

1.14 IMEI & IMEI SV | International Mobile equipment Identity

1.15 IMEI check call flow

1.16 TMSI | Temporary Mobile Subscriber Identity

1.17 MGT | Mobile Global Title

1.18 MSRN | Mobile Station Roaming Number

1.19 Location Identities in CS Core

1.20 Basic Procedures in CS Circuit Switching Core Network

1.21 IMSI Attach Signaling Procedures

1.22 Authentication Procedures

1.23 Ciphering Procedures

1.24 Purge MS

1.25 What is meant by Location update & what is its types ?

1.26 Normal Location Update Procedures

1.27 IMSI Attach Signaling Procedures

1.28 IMSI Detach Signaling Procedures

1.29 Periodic Location update Procedures

1.30 Combined Attach Procedures

1.31 Independent Location update

1.32 Data Recovery Location Update

1.33 Location Update while Roaming

1.34 Call Flow MO/MT Signaling Procedures

1.35 SMS call flow

1.36 MSC in Pool



Who Should Enroll?

  • Telecom engineers aiming to enhance their CS Core knowledge.

  • Students or graduates seeking a career in telecom networks.

  • Professionals transitioning to voice core technologies.

By the end of this course, you’ll be fully equipped to work confidently in telecom CS Core environments and make a tangible impact in your career. Join now and start your journey to mastering voice networks!


Course Content

  • 1 section(s)
  • 36 lecture(s)
  • Section 1 Mobile CS & CSFB Voice Core Concepts in 2G GSM, 3G UMTS & 4G-LTE (CSFB)

What You’ll Learn

  • Understand basics of CS & CSFB Core Networks, Student will advance in his Voice core Career track, Real-world skills required for job in any telecom operator or vendor company, Architecture of CS & CSFB Core Networks, Call flows & Different Procedures in CS & CSFB Mobile Core networks, Mobile & Network Identifiers


Reviews

  • I
    Ireti Sedami HOUNDEBASSO
    5.0

    Une explication très détaillée des concepts clés CS

  • D
    Daniel Bulla
    2.5

    The instructor doesn't know how to deliver the content. He's messy with the slides and his voice is not clear enough.

  • A
    Afər Məmmədov
    5.0

    very good

  • N
    Nurgun Ganbarova
    1.0

    low voice quality and simple slides

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