The majority of Mobile Networks Operators (MNOs) with 4G data services still rely on 2G and 3G for their voice services.  As these MNOs move towards 5G they are reviewing the use of this legacy 2G and 3G spectrum with a view to reusing it for new services. Whilst refarming the spectrum for 5G will enhance the reach of the new radio, it will have a devastating impact on their customers, no only at home, but also when they are roaming on networks that are taking similar decisions.  The answer is to embrace Voice over LTE (VoLTE), to deploy an IP Multimedia Subsystem (IMS) Core to support voice services on 4G and ultimately on Voice over New Radio (VoNR) in 5G.  The beauty of deploying a Ribbon IMS Core is that it is common to both 4G and 5G, integrating seamlessly with an EPC / 5GC and subscriber databases.

Why do you need a Voice Core for VoLTE and Vo5G?

MNOs are evolving their network infrastructure for voice services in both 4G & 5G ecosystem. As 2G / 3G networks are shuttered the necessity to deploy 4G VoLTE becomes a business imperative. As well as maintaining voice services both at home and when roaming, operators also have challenges to deliver improved call quality, reduce operation costs, and meet customers desire to experience High Definition (HD) voice. Deploying the Ribbon IMS Core for voice services utilizing the LTE network will seamlessly evolve and function together with 5G VoNR in the operator’s networks.

Leverage a Common IMS Core for 4G & 5G Voice

IMS Architecture

With the Ribbon IMS Core, MNOs benefit from a common voice core that supports existing VoLTE services and VoNR when 5G is deployed. The Ribbon IMS Core provides seamless interconnect and roaming network functions to ensure subscriber services when they travel beyond the home network coverage, advanced insights and analysis with automation, security, and the flexibility of deployment in modern cloud-native  infrastructures. Mobile Network Operators can offer their customers a communications experience with unrivalled quality, reduce the cost of service, and open doors for new service opportunities.

Cloud-Native Voice for Cloud-First Service Providers

Ribbon Telco Cloud

Are You Ready to Go (Cloud) Native?

Ribbon’s cloud-native software enables secure cloud-based real-time voice communications services delivered over private, public and hybrid cloud environments. The telco services enabled by the Ribbon Telco Cloud software include Voice Over LTE (VoLTE), Voice Over New Radio (VoNR), Voice over Wi-Fi (VoWiFi), business and residential Voice over IP (VoIP) services, and network interconnects. In addition to providing secure real-time voice communications, Ribbon’s Telco Cloud solutions provide service assurance, network monitoring and fraud prevention while taking advantage of cost-efficient and automated operations using cloud-native approaches.

Telco Cloud Solutions

Unified 5G xHaul

With the introduction of 5G, Mobile Network Operators and Private Network Operators have the opportunity to introduce a vast array of mobile services, starting today with enhanced mobile broadband, services like online mobile gaming, e-health, AR/VR, IoT/IIoT applications will soon follow.

Ribbon seamlessly integrates IP and Optical transport technologies with powerful, intent-driven domain orchestration to provide a 5G xHaul solution tailored to meet each operator’s specific business requirements and the flexibility to evolve as the operator and their services evolve.

5G xHaul Solutions

Future-proof IMS Portfolio for 4G & 5G Voice


The Ribbon IMS Core combines robust IMS service functionality with the ability to securely and intelligently route high volumes of Session Initiation Protocol (SIP) and Diameter traffic together with media processing and transcoding at both the core and the edge of the network. With a cloud-native deployment option an MNO is better prepared to minimize the disruption of 5G.  Deploy Ribbon’s IMS Core once for VoLTE and be ready for VoNR. A modern cloud-native deployment ensures cost effective deployment, simplified lifecycle management and scalability so the IMS Core can grow as your network grows and evolves. For more information please visit:

IP Multimedia Subsystem (IMS)

Analytics & Insights

In today’s rapidly changing telecommunications landscape, delivering higher customer satisfaction, operating your network efficiently, ensuring network security and innovating new products & services , are more difficult than it used to be. From Internet of Things (IoT), Over The Top (OTT) challenges, and mobile application growth through all the way to deployment of 5G network, there will be rich datasets on subscriber and network behavior, preferences, and needs. Powered by our big data analytics portfolio of OperationsSecurity, and Monetization applications, you can grow your investment with numerous out of the box applications to speed up deployments and provide a significant return on investment.

Advanced Analytics and Insight Solutions

Call Trust - Robocall and Fraud Mitigation

What do your customers do when they receive a phone call from someone they do not know or a number they do not recognize? Perhaps they answer it, but far more likely they reject it, send it to voice mail, or just ignore it. In our current telecommunications world, everyone does this, because they are barraged by spam and robocalls and assume the worst – someone wants to pitch something I do not need or want, or this will be an attempt to defraud me.

With Ribbon Call Trust you now have a solution that you enables you to restore their trust in the phone. Even if you have an extension to the FCC requirement to implement STIR/SHAKEN, you still need to comply with the mandate to have an originating robocall mitigation program in place. With Ribbon Call Trust you can commit to your customers that you can meet the FCC mandate. In addition, you can add more value by being able to provide terminating robocall and fraud mitigation so your customers will be at much less risk from bad actors trying to get their private information or trying to prey on them with money scams.

Identity Assurance

Wholesale Interconnect, IPX and Roaming for Mobile Networks


Ribbon brings decades of global experience in enabling secure and scalable IP-IP and TDM-IP, voice and multimedia interconnect between diverse mobile and fixed IP networks, delivering session connectivity and interworking across diverse IMS and non IMS networks. For VoLTE/IMS interconnect and roaming, Ribbon offers secure Diameter messaging and SS7 signaling, support for VoLTE interconnect and roaming functionality that includes home or local media routing. For more information please visit

Wholesale  SS7 and Diameter Signaling