Hang this poster in your office, keep it on your laptop as a handy reference, or use it as a virtual background. Hurry, this digital download will only be available for a short time!

What to look for in this poster:

4G LTE brought us IP packet-based networks. With VoLTE in place, networks can support data and voice simultaneously. Here are some notable aspects of VoLTE that you can discover in this poster:

What is the IP Multimedia Subsystem (IMS)?

IMS is a framework for delivering IP-based multimedia services. It consists of three layers:

• Connectivity Layer - comprised of routers, switches, and access elements for connecting to the underlying LTE network and the PSTN
• Control Layer - comprised of servers like the CSCF for call set-up
• Service Layer - comprised of content or application servers like TAS

What are QoS Class Identifiers (QCIs) for VoLTE?

QCI is level of acceptable QoS for various types of traffic. QCI 1 (Voice Media), QCI 2 (Video), and QCI 5 (IMS Signaling) are commonly used for VoLTE.

What are the VoLTE Interfaces and Protocols?

VoLTE uses various interfaces and protocols between network nodes. The signaling messages occur in the control plane. The user data is carried over the user plane.

Interested in learning more about VoLTE? Contact us!