Your NMS knows which ONUs went down. It usually cannot tell you whether that is twelve unrelated drop cables or one splitter in one street cabinet. The new ONU GPS Map puts OLTs, splitters and subscriber ONUs on real geography, in the browser and in the field engineer app.
An honest rundown of the best SmartOLT alternatives for ISPs in 2026, from full-stack monitoring to open-source DIY. Each tool gets a real "best for" verdict, plus a comparison table and migration FAQ.
Fiber rarely fails suddenly. It drifts: a fraction of a dB per week, over a month or two, while up/down monitoring reports green. Here's what slow optical decay looks like in real data, and how to catch it before the customer calls.
Six months after the v1 launch, the NetSense Network Map has gained dynamic topology, version diffs, multi-node selection, flexible links, and Netbox sync. Two networks have already retired Weathermap entirely. Here's what shipped and what's next.
Detection is the easy part. The hard part is tracing a DDoS from a border IP all the way to the specific subscriber flooding a Chinese ASN — and containing it without killing upload speeds for every paying customer. Here's what we deployed across ISP customer networks in March 2026: automated tracing chains, per-subscriber nftables rate limits (including the ones that broke QUIC on day one), and the Quarantine BNG architecture.
When multiple ISPs called us the same week about unexplained upstream congestion, we expected a peering issue. Instead, NetSense Flow revealed thousands of compromised subscriber devices launching coordinated outbound UDP floods toward Chinese ASNs. This is the story of how we diagnosed it — and why most ISP playbooks fail when the DDoS is coming from inside the network.
When a subscriber loses internet, the root cause is often an ONU going offline—but diagnosing why can take time if operators rely only on OLT CLI and scattered tools. In this guide, we walk through practical techniques for troubleshooting ONU outages in GPON networks, including how to identify power loss, optical faults, partial PON failures, and signal degradation using historical telemetry and network observability. Learn how ISPs can reduce troubleshooting time and quickly pinpoint whether the issue is a single customer, failing fiber, or a larger access network problem.
Twenty years of building ISPs teaches you what diagrams, certifications, and dashboards don’t. These are hard-earned lessons on monitoring, redundancy, automation, and customer experience — learned during real outages, under real pressure.
NetSense Network Map - a modern, fast, clean, real-time replacement for Weathermap, designed for ISPs, IXPs, and Telcos who need a topology view they can actually trust day in and day out.
Traditional ping monitoring leaves blind spots and can even cause false alerts. NetSense NMS now introduces a continuous, lightweight ping engine—delivering real-time insight, detailed metrics, and scalable performance built right in.
Partial PON Port Down detection is now available in NetSense NMS. This new feature alerts you when multiple ONUs on a PON port go offline due to fiber issues—while the port itself is still reported as up. By distinguishing between customer-side power losses and real network-side problems, operators can act faster, improve troubleshooting, and deliver a better customer experience.
We redesigned the NetSense Live Dashboard with a bold move: split OLTs and Switches into their own views and stripped away the noise. The result? A faster, clearer way to spot what matters — without digging.
