DWDM Calculator

ROI Calculator – Own xWDM Layer (S100) vs. Lease

Monthly lease cost (PLN) Target capacity (Gb/s) CAPEX S100 (equipment + deployment, one-time, PLN) Maintenance/service (% of CAPEX per year) IRU fiber cost (optional, PLN) Bandwidth growth (% per year) Analysis horizon (years) Cost of capital / discount rate (%)

Monthly TCO

Lease: –

Own layer (avg/month): –

Payback & ROI

Payback: –

ROI after 36 months: –

ROI after 60 months: –

NPV: –

*Simplified estimates. “Own layer” = CAPEX spread evenly over the analysis horizon + maintenance + IRU / years. Lease cost grows annually with bandwidth increase. Default values are editable.