GPON OLT Planner
Size GPON ports, line cards and OLT chassis from subscriber, split and bandwidth assumptions for an initial engineering review.
Result
| Capacity metric | Value |
|---|---|
| Average active ONTs per PON | 63.7 |
| Busy-hour traffic per PON | 509.9 Mbps |
| GPON downstream utilisation | 20.5% |
| GPON upstream utilisation (symmetric assumption) | 41.0% |
| Installed subscriber capacity | 2880 |
About GPON OLT Planner
Estimate the physical GPON resources needed from homes passed, take rate and split policy, then sanity-check busy-hour PON utilisation. The model separates commercial take rate from installed optical capacity for early engineering planning.
Capacity versus optical reach
Port count is a capacity decision, while split loss and reach are optical decisions. Validate the proposed split with a full ODN power budget and confirm uplink, redundancy and chassis limits with the vendor.
Planning assumptions
Busy-hour demand varies by market, package mix and traffic policy, so replace the example with measured subscriber data when available. Allow spare PON ports and chassis slots for construction changes, faults and growth. Check uplink oversubscription at the chassis level as well as utilisation on each PON. Real designs also require protection strategy, power, cooling, rack space, management capacity, multicast behaviour and compatible ONT licensing.
Common use cases
- OLT procurement sizing.
- PON split-policy comparison.
- Subscriber growth planning.
Edge cases and gotchas
- Treat calculated chassis and card counts as the minimum service capacity, not the purchase quantity. Include redundancy, spares, uplink modules, control cards, licenses, power feeds, rack capacity and measured growth before issuing a bill of materials.