VoLTE and the IMS

Alta3 Research
Training overview
Professional Course
Webinar, On-site, Self-paced Online
5 days
From 295 USD
Start dates
Private Team Event delivered Virtually

295 USD
Start anytime

United States of America
Private Team Training delivered On-site or Virtually

Course description

VoLTE and the IMS

Learn Voice over Long Term Evolution (VoLTE), IP Multimedia Subsystem (IMS), and Session Initiation Protocol (SIP) in this intensive 5-day class. This class thoroughly studies call flow through the EU-TRAN, the EPC and into the IMS core. We will make the entire picture clear and backup all that we teach with call flows using an IMS platform. This course also covers enough of other technologies like Diameter and DNS to allow you to understand the complete picture. The lessons in this course are clear, very technical, and always practical.

Want to find out more?

Training content

IMS Architecture & SIP Proxies

  • Standards Bodies
  • VoLTE Introduction
  • The Building Blocks
  • Call Control Paths
  • Roaming and Visited
  • VoLTE Access
  • Call Flow

IMS Identifiers

  • IMS IDs
  • UICC

VoLTE and IMS Architecture

  • HSS

Bearer and APNs

  • Commonly Utilized Bearers

Power up Process

  • Overview
  • System Acquisition and RRC Connection Setup
  • Network Attach

Handover Between eNodeBs

  • Idle Mode
  • Active UE

Tracking and Paging A UE

  • Overview
  • Tracking and Paging a UE

SIP Architecture.

  • The Big Picture
  • SIP Message Format
  • IMS SIP Transactions
  • SIP Control Path
  • Proxy vs. B2BUA

SIP Via Paths

  • The Via Header
  • The SIP Transaction
  • Impact of Via Path on the SIP Dialog

SIP Route Headers

  • RR and Route
  • Looping

Basic SIP & IMS Specific Headers

  • Start Line
  • Via:
  • Via: branch parameter
  • From:
  • To:
  • Call-ID:
  • SIP Dialog ID
  • Contact:
  • CSeq: (Command Sequence)
  • Content-Type:
  • Content-Type: message/sipfrag RFC 3420
  • Content-Length:
  • Max-Forwards:
  • Allow:
  • User-Agent:
  • Supported:
  • P-Preferred-Identity: and Privacy: RFC 3325 (UA to P-CSCF)
  • P-Preferred-Identity: to P-Asserted-Identity:
  • P-Access-Network-Info: RFC 3455
  • Authorization: RFC 3261 Section 22.2
  • Path: RFC 3327
  • Service-Route: RFC 3608
  • Introduction to SigComp
  • SigComp Example


  • Overview
  • Diameter Message Structure
  • Customization
  • Registration Call Flow
  • SCTP


  • Overview
  • H.248 in the IMS Core

Initial Filter Criteria (iFC)

  • iFC Function
  • Data Structure
  • iFC Logic
  • iFC Example


  • The Presence Model
  • IMS Call Flow
  • Basic vs. Rich Presence
  • Message Examples

Session Description Protocol (SDP)

  • Overview
  • Lines
  • Offer/Answer
  • Preconditions


  • Enforcing QoS

IMS Call Flow Examples

  • De-Registration
  • Media Relay

Circuit Switched Fallback

  • CSFB Originating
  • CSFB Terminating
  • Ladder Diagram


  • Overview
  • Routing Number
  • SR-VCC Control Paths
  • The Media Path
  • SR-VCC Call Flow

Emergency Call Flow

  • References
  • Components

Charging in the IMS

  • Charging Systems Overview
  • Charging and Call Flow


  • Zone File
  • Locating SIP Servers


  • E-Learning fee: $295.00
  • Contact the provider for more information about pricing for on-site delivery option

Why choose Alta3?

25+ years specializing in technology training 

Over 95% student satisfaction rate

Training delivered in 9+ countries

About Alta3

Alta3 Research

Since 1997, Alta3 Research has been empowering organizations and individuals using their expert approach to Cloud, DevOps and Telecom training. We develop and perform technical training via live classroom, online classes and our library of self-paced learning videos and labs....

Read more and show all training delivered by this supplier

Contact this provider

Fill out your details to find out more about VoLTE and the IMS.

  Contact the provider

  Get more information

  Register your interest

Country *

Contact info

Alta3 Research

 Show phone number

Request Information

Have a question about this course? Fill out this form and the provider will get in touch with you shortly

View again
Supplier Directory
Join our Supplier Directory to:
- Gain Traffic
- Get Noticed
- Showcase Your Services
- Free Listing Available