5G SA Overlay — Standalone Services Without Rebuilding Your Core
Launching 5G Standalone usually sounds like a full core replacement. It doesn’t have to be. A 5G SA overlay lets you add Standalone services on top of the 4G core you already run, so subscribers move between 4G and 5G on a single network — same profiles, same policy.
Summa Networks provides the SDM and control-plane functions that make the overlay work: 4G/5G interworking, a shared subscriber base across both generations, and a cloud-native deployment you can roll out at your own pace. You add 5G SA where it makes sense, when it makes sense — without a forklift upgrade and without locking your roadmap to a single vendor.
Ready for 5G. Cloud-native. Open to AI-driven operations.
Evolve your network with a flexible architecture designed for 5G, cloud-native deployments and future
automation.
How can operators move to 5G SA without replacing their existing 4G core?
For many mobile operators, migrating to 5G Standalone (SA) can seem daunting. A full network overhaul requires time, investment, and disruption to live services. But staying competitive means offering next-gen services — and fast.
For carriers building their 5G offering, creating an entirely separate network from the existing 4G infrastructure is costly and operationally complex. There has to be a smarter path forward.
5G SA as an overlay — on top of your existing 4G infrastructure
Summa Networks enables a 5G SA overlay that runs on top of your current 4G infrastructure. Thanks to our interworking capabilities, operators can deploy a 5G SA core alongside their legacy setup without starting from scratch.
Our solution supports seamless communication between 4G and 5G components, so you can launch 5G SA services — such as network slicing, URLLC or massive IoT — while continuing to serve your existing subscribers on 4G.
It’s a future-ready, cost-efficient path to 5G — at your own pace.
Four steps to 5G SA — without disrupting your 4G network
Deploy Summa Networks’ 5G SA Core as an overlay alongside your existing infrastructure.
Enable interworking with your existing 4G network (EPC) for seamless coexistence.
Launch 5G SA services independently — slicing, URLLC, massive IoT — while keeping your 4G users connected.
Expand 5G coverage and services gradually, without a disruptive full network migration.
5G SA at your pace. Without the disruption.
Fast & Flexible 5G Evolution
Accelerate your 5G roadmap without dismantling your current network.
Interworking with 4G
Seamless EPC integration ensures smooth transition and coexistence.
Cost-Efficient Deployment
No full core replacement — reduce investment risk and time to market.
Future-Proof Architecture
Supports enhanced broadband, network slicing, IoT, and beyond.
Modular & Cloud-Ready
Part of our modular core portfolio — on-premises or public cloud.
Ready to unlock 5G SA?
If you’re looking to bring 5G SA to your existing 4G network, our overlay solution can get you there — fast, and on your terms.
Contact us to learn more about how we make 5G evolution simple.
