As can be seen from the figure, a monthly ARPU of 25
euros is more than sufficient for a profitable business case,
with an NPV of 30 million euros. The business becomes
profitable by the third year, as the penetration of LTE services
increases. The overall payback period is less than 31V2 years,
always a key metric in telecommunications investments, in
particular because future cash flows always become the more
uncertain the more time passes. Looking at the revenues from
another perspective, a monthly ARPU of approximately 15
euros would be enough to cover all the costs (i.e., the Net
Present Value is zero). Together, these results illustrate well
the relative lowness of the capital and operational
expenditures associated with the fixed use case.