Introducing Modulo’s VoLTE Solution for Mobile Network Operators (MNOs)

4G LTE technology is becoming more and more popular around the world because of its fast speeds for mobile data transfer. Today, LTE (or Long Term Evolution) is used almost exclusively for data, while most voice calls are handled by 2G or 3G connections.


Voice over LTE (or VoLTE) is here to change that.

What is VoLTE?

VoLTE is a set of standards that allow for the handling of voice calls on the LTE network. As MNOs around the world continuously expand their 4G LTE infrastructure deployment, more and more of them are looking into implementing VoLTE to replace 2G/3G infrastructure for handling voice calls on their network.

The popular voice call apps today, like Whatsapp, Skype and Viber, use VoIP technology, and Over the Top (OTT) applications, meaning they use the mobile network infrastructure to provide communication services unrelated to the MNO. VoLTE gives mobile operators the opportunity to offer their customers call quality that is better than both 3G-based calls and VoIP-based calls. VoLTE utilizes the very high speeds of data transfer to allow for faster, seamless, high-quality calls over the mobile data network.

Modulo’s IMS & VoLTE solution provides mobile operators the ability to offer their own non-OTT rich multimedia services over the LTE network, such as voice calls over the LTE data network, multimedia conversations between two or more users (including transfer of speech, video, files and other data), presence-enabled chat systems (users can see if peers are online/offline) and more.

Modulo’s IMS & VoLTE product suite is a scalable, reliable, flexible and cost-effective solution for mobile operators. It allows even small-scale operators to expand their 4G/LTE set of services, lower call-routing costs, offload voice traffic from 2G/3G networks, and of course, provide better call quality to their customers.

How the Modulo VoLTE Solution Works

Our VoLTE solution is in fact the result of the integration of several different products; It includes an IMS Core, an MMTEL TAS, and an MRF. It is NVF-enabled, which means it can be used in a hardware setup or as a Network Virtualized Function on the cloud.

The IMS Core is the architectural framework that is used for delivering IP multimedia services. Multi Media Telephony (MMTEL) is a global standard for multimedia applications on mobile networks, and the MMTEL Telephony Application Server (TAS). The MMTEL Telephony Application Server (TAS) is a NFV-compliant framework that allows the telephony applications to run. The Media Resource Function (MRF) is a multimedia server that is a part of the IMS architecture, which interprets, processes and manages media streams in the network.