VoLTE from A-Z

Some of your questions that will be answered by this book:


  • Why is IMS becoming an important function for LTE deployments supporting roaming voice subscribers?
  • What are the main controlling entities for voice support in an IMS / LTE system environment?
  • How are voice bearers identified and handled distinct from other services?
  • How are sessions initiated and controlled, what is meant by a transaction, a SIP call and a SIP dialog?
  • How are SIP transactions and dialogs identified? What are the most important header fields and their purpose?
  • Where and for what purpose is Diameter protocol being used in a network deploying voice over LTE?
  • Which mandatory codec types have to be supported for the media stream?
  • How does a softswitch work and what are its main components and signaling interfaces?
  • What is CS Fallback and when and where is it applicable? How is CSFB signaled / triggered?
  • What is SRVCC and when and where is that applicable? How is this distinct from CSFB?
  • How is SMS handled in an LTE voice environment and what are the alternatives for SMS here?

Who should acquire this book?

  • Design engineers who need to understand Voice over LTE protocols, features and interfaces.
  • Anyone who need to understand the VoLTE terminology, features, interfaces and the applicability in future 3GPP networks.

Product Details:

  • Paperback / eBook
  • 408 Pages
  • over 150 Illustrations and Tables
  • ISBN 978-3-936273-76-2
  • Price Paperback: Euro 399.- (net)

  • Price eBook: Euro 299.- (net)

  • Download the order form and fax or e-mail it to us (



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