Live SBA fabric
Watch all 12 NFs, the UE→gNB→UPF→internet user plane and the SBI bus update in real time as traffic flows through the actual core.
Not a simulation. Drive a genuine Open5GS + UERANSIM standalone core in your browser — attach UEs, open PDU sessions, inject faults, fly it over a satellite and cross a roaming border, with guided playbooks that verify every step against the live network.
The core is genuine Open5GS: real NGAP, NAS, PFCP and SBI signalling and a real GTP-U data plane that reaches the internet. Satellite mode applies true TR 38.821 delay to real packets. The only emulated layer is the radio PHY — the same pre-launch method operators use to validate cores before anything flies.
Everything in one core
One login, every scenario — from the SBA fabric to satellites and roaming.
Watch all 12 NFs, the UE→gNB→UPF→internet user plane and the SBI bus update in real time as traffic flows through the actual core.
Put the real core on a LEO, MEO or GEO link and measure how 5G behaves — GEO round-trip really hits ~541 ms, applied with tc netem per TR 38.821.
A full second visited-network core with SEPP-to-SEPP interconnect — see the 3GPP roaming border live in a browser.
Kill, delay or block any NF and watch the anomaly engine catch it — then heal the core and confirm recovery from the same signals.
Step-by-step scenarios that verify each action against the live core — a self-teaching tutor, plus a searchable 5G glossary and AI assistant.
A genuine shell on the core host with an explained command palette — tail logs, restart NFs, ping through the UPF, decode the ladder.
Click any NGAP/NAS/PFCP message to decode it, build eMBB/URLLC/mMTC slices and tune 5QI QoS with live per-flow meters.
Registration and PDU-setup rates, throughput, NF health — live dashboards straight from the running core’s Prometheus metrics.
Gamified challenges auto-verified against real state — attach a UE, break & heal, master a slice, reach zero anomalies.
Hands-on, not slides
Real, verifiable exercises on a running network.
Trigger registration and watch NGAP → NAS → security → Registration Accept flow in the live ladder.
Open a PDU session and ping the internet through the UPF — watch throughput counters climb.
Stop the SMF, catch the anomaly, restart it and confirm recovery — real NOC muscle memory.
Switch to GEO and feel 5G at 35,786 km — then run a LEO pass with discontinuous coverage.
Explore the SEPP-to-SEPP N32 interconnect between a home and a visited network.
Add subscribers to the UDR and stand up dedicated slices with their own SLAs.
FAQ
Everything you need to know before your first session.
Real. It runs Open5GS with 12 live network functions and UERANSIM as the RAN — real NGAP, NAS, PFCP and SBI signalling and a real GTP-U data plane that reaches the internet. The only emulated layer is the radio PHY (and satellite propagation delay in NTN mode, applied genuinely with tc netem).
No. The entire lab — core, RAN, terminal and every visualisation — runs in your browser. Nothing to download, nothing to configure.
Attach UEs and open PDU sessions, provision subscribers, inject faults and watch the anomaly engine, apply LEO→GEO satellite delay, explore roaming over N32, trace the message ladder, run slices and QoS — all guided by playbooks that confirm each step against the live core.
LEXX Live issues a username and password per student. Once your access is active, log in here and open the lab from My Labs — the console launches instantly.
Yes — multi-seat access for teams, universities and operators, with instructor support. Email support@lexx.com or call +1 888-330-9071.
Get hands on a real core in the next two minutes — attach a UE, break the SMF, fly it over a satellite.
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