TECHNICAL
COMPARISION OF HFC WITH CABINET REMOTE OLT AND NODE PON Cabinet Remote OLTs use very little power – pennies a year on a per-subscriber basis even when battery maintenance costs are included. We add the battery maintenance assumption to the cost of electricity, and for the 10,000-home cabinet we can save almost all of the power cost versus HFC:
SUMMARY AND CONCLUSION
Anecdotally, we’ve heard blended operators (those who run both coax and fibre networks) express the sentiment that a fibre-based PON network costs one-tenth as much as their HFC networks to operate. This cost study validates that and provides specific documentation other operators can use as they build out their network planning business cases. Even with the ROLT deployment model, the operator can expect to save anywhere from 60% to upwards of 80% annually on power costs versus HFC networks. Broadband Service Providers who operate in countries with high electricity costs would experience ever greater annual cost savings by migrating to a fibre-based PON network. The dramatic savings in operating expense is a factor behind why operators are aggressively choosing to deploy FTTH PON networks, often with 10G XGS-PON. As operators look to build greenfield network in new markets or communities, or look to blended networks to help facilitate their eventual migration from HFC to fibre, power savings are a material factor driving their decision to deploy fibre-based PON architectures.
This is the total annual cost per home:
Electricity
HFC Node + 6 Cabinet
Savings versus HFC
$0.10 $0.15 $0.20 $0.25 $0.30
$9.25
$0.40 $0.50 $0.59 $0.69 $0.79
96% 96% 96% 96% 96%
$11.55 $13.85 $16.15 $18.45
For 64 home per PON Node PON, adding the battery maintenance to the annual electricity cost works out to $4.05 to $4.71 per home per year, as compared to $9.25 to $18.45 per home per year for HFC Node + 6. That is quite a difference! Although not shown in the table, comparison with HFC Node + 3 produces an even greater difference. The table also shows what savings a 128 home per PON Node PON could produce.
www.calix.com
Total annual cost per home:
Electricity HFC
NodePON Savings
NodePON versus HFC
Savings
Node+6
versus HFC
$/kWh
64 Home PON
128 Home PON
$0.10 $0.15 $0.20 $0.25 $0.30
$9.25
$4.05 $4.21 $4.38 $4.54 $4.71
56% $2.52 64% $2.85 68% $3.17 72% $3.50 74% $3.83
73% 75% 77% 78% 79%
$11.55 $13.85 $16.15 $18.45
MARCH 2025 Volume 47 No.1
101
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