HFC NBN is one of seven NBN technology types in Australia. It uses Telstra’s old cable TV network, the coaxial cables that delivered pay TV to Australian homes in the 1990s and 2000s. If your business address is in an HFC-serviced area, you are on it. About 25% of NBN premises use HFC, mostly in metro areas. Here is what that means in practice, and what it means for your business phone system and internet.
What is HFC NBN
HFC stands for Hybrid Fibre Coaxial. The technology runs fibre-optic cable from the NBN point of interconnect to a street node. From the node, coaxial cable runs to your premises. The coaxial type is the same as cable TV. NBN Co acquired parts of Telstra’s HFC network. They integrated the network when they built the NBN. The HFC footprint covers about 2.5 million premises across major metro areas. That includes parts of Sydney, Melbourne, Brisbane, Adelaide, Perth and the Gold Coast. To check whether your address is HFC-serviced, the NBN Co address checker tells you in 10 seconds.
How does HFC NBN perform
HFC supports the full range of NBN speed tiers. The maximum theoretical speed on HFC is 1000/400 Mbps (NBN 1000), though real-world performance is typically lower. The main performance difference between HFC and full-fibre is the coaxial segment. This can introduce congestion during peak hours. Peak hours for residential areas are typically 7 to 9pm. Business-only NBN connections see less of this issue. Most businesses on HFC experience typical download speeds of 80 to 95% of the tier’s headline speed. For most business needs (VoIP, video conferencing, cloud apps, general office internet), HFC performs well.
HFC vs other NBN technologies
HFC is one of seven NBN technology types. The full list, in order: FTTP, FTTC, FTTN, FTTB, HFC, Satellite, and Fixed Wireless. FTTP (Fibre to the Premises) is the gold standard. FTTC is Fibre to the Curb. FTTN is Fibre to the Node. FTTB is Fibre to the Building. HFC is Hybrid Fibre Coaxial, the topic of this article. Satellite is Sky Muster. Fixed Wireless is for regional and rural premises. The technology difference: FTTP is full fibre to your premises. FTTC, FTTN and FTTB use copper for the final segment. HFC uses coaxial. The older technologies (FTTN, FTTB, HFC) are being upgraded to FTTP over time. Most businesses don’t need to know which technology they are on. They just need to know the practical implications for their internet and phone setup.
The FTTP upgrade plan
NBN Co has announced a plan to upgrade HFC areas to full fibre (FTTP). The upgrade is rolling out progressively, area by area, with completion targeted for 2030. When your area is upgraded, your existing HFC connection is replaced with FTTP. The upgrade is free for most premises. You may need new equipment at your end, such as an NBN connection box or a new router. NBN Co notifies affected premises in advance. For businesses, the upgrade is generally a quick swap with minimal disruption. After the upgrade, you get full-fibre performance, which is the gold standard.
HFC and your business phone system
If you are on HFC NBN, your SIPcity business phone system works the same as on FTTP. The phone system doesn’t care which NBN technology delivers the internet. The HFC considerations for phone-system customers are three. The coaxial segment can introduce variable latency during peak hours, which affects VoIP call quality. If your business runs multiple simultaneous VoIP calls plus other internet usage, the available bandwidth matters. The planned FFTP upgrade will improve all of this. For most businesses, HFC is fine for VoIP. Just budget for occasional congestion-related call quality issues during residential peak hours.
Common HFC NBN issues and how to fix them
The three most common HFC NBN problems in business settings are: dropouts, slow speeds, and high latency. All three affect VoIP call quality. The fixes: dropouts are usually a line or signal issue. NBN Co needs to address these. Call your ISP first, then NBN Co. Slow speeds can sometimes be improved by upgrading to a higher speed tier. High latency is often a router or modem issue. A hardware refresh resolves it. If your HFC performance is consistently poor, your business may be in an FTTP upgrade area. Check the upgrade map at the NBN Co website.
Choosing an HFC NBN business plan
NBN business plans for HFC-serviced addresses are the same as for FTTP addresses. The technology doesn’t change the available speed tiers. The most common HFC business plans are: NBN 50/20, NBN 100/40, and NBN 250/100. NBN 50/20 fits most small businesses. NBN 100/40 is for medium businesses. NBN 250/100 suits larger businesses with heavy upload needs. For HFC specifically, NBN 50 is more than adequate for most small businesses. If you have heavy concurrent usage or video conferencing, NBN 100 is the safer choice.
What to do next
The NBN Co address checker tells you your technology type. If you are on HFC, your SIPcity plan works the same as anyone else’s. If you are planning to upgrade your NBN connection, consider whether FFTP is in your area yet. If you are choosing a new SIPcity plan, the NBN technology is one consideration. The speed tier and business support matter more.
Ready to talk NBN for your business? View SIPcity business NBN plans or talk to our team and we will map the right NBN setup for your business.
