The document discusses building a generic business model for fiber to the home (FTTH) networks. It finds that for a payback period of less than 5 years, subscriber takeup must be at least 30%. Increasing takeup and reducing costs per home connected have the strongest positive impact on payback. Increasing ARPU and cash margins have a lower effect. Introducing a cost of money increases payback periods, but also increases the sensitivity to improvements. Potential solutions to enhance the business model include addressing underserved business markets, pursuing partnerships, and reconsidering premium and wholesale strategies.