Calculate total revenue at risk from a fiber outage. Enter subscriber counts and ARPU to see live financial exposure growing every second.
Every minute this outage stays open, your exposure grows. Deterministic fiber fault location narrows the search to a 500-foot window — get crews to the right spot the first time.
Locate the exact fault → Fiber Damage Locatoropticalpathengineering.com
A single fiber cut can take thousands of subscribers offline simultaneously. Unlike equipment failures that affect one node, a fiber break on a backbone or distribution segment cascades across all downstream customers.
The financial impact compounds quickly: residential subscribers lose service they pay for, SMBs face productivity loss and potential customer churn, and enterprise circuits with SLA contracts trigger penalty clauses the moment MTTR is exceeded.
The single biggest variable in outage cost is time-to-restore. A fault located precisely within minutes reduces crew dispatch time, eliminates unnecessary digging, and gets service back before SLA clocks expire.
OTDR-based fault location gives distance-to-fault in cable length. Converting that to a precise physical address requires accounting for cable slack, route deviation, and geospatial mapping — exactly what advanced fault locator tools provide.
A 90-minute outage doesn't cost the same everywhere — who it hits matters as much as how long it lasts. Take three real scenarios, all 90 minutes:
2,000 residential subscribers, no SLA. No contractual penalty, but 90 minutes of downtime across that many households generates real support call volume and measurable churn risk over time — this calculator's residential exposure figure captures the revenue-at-risk side of that, even without a penalty clause forcing the issue.
40 SMB circuits, informal SLA. These customers often don't have a hard contractual MTTR, but they do have real switching costs if outages become frequent — the ongoing-relationship risk this calculator's SMB tier is meant to represent.
3 enterprise circuits, 99.99% SLA. A 99.99% SLA allows roughly 52.6 minutes of downtime per year total — a single 90-minute outage on its own already exceeds the entire annual allowance, and the penalty clause activates automatically. Three circuits at a meaningful MRC each can outweigh the other 2,040 subscribers combined in immediate financial exposure, even though they're a tiny fraction of the subscriber count. This is exactly why NOC teams triage enterprise SLA circuits first during a shared-cause outage — not because residential customers matter less, but because the clock and the penalty are already running.
Does this calculator include indirect costs like customer churn or brand damage?
No — it calculates direct, quantifiable exposure (lost revenue and contractual SLA penalties) during the outage window itself. Churn and reputation impact are real but harder to attribute to a single incident, so they're deliberately left out rather than estimated with a made-up multiplier.
How is this different from the SLA Breach Calculator?
The SLA Breach Calculator tracks one specific contract's countdown-to-penalty in real time. This tool is broader — it totals exposure across your whole affected subscriber base (residential, SMB, and enterprise together) for a single incident, whether or not any of them have a formal SLA.