NBN Technology Types and VoIP: The Summary
| FTTP - Fibre to the Premises | FTTC - Fibre to the Curb | FTTB - Fibre to the Building | HFC - Hybrid Fibre Coaxial | FTTN - Fibre to the Node | Fixed Wireless | Sky Muster Satellite | |
|---|---|---|---|---|---|---|---|
| How It Works | Optical fibre to your building | Fibre to a pit near your building, then short copper run | Fibre to the building's communications room, then copper to premises | Fibre to a node, then coaxial cable (old cable TV network) | Fibre to a street cabinet, then copper run to premises | Radio signal from tower to external antenna | Geostationary satellite |
| VoIP Rating | Excellent | Very Good | Good | Good | Variable | Moderate | Poor |
| Key Consideration | Best option. Consistent, low latency. | Short copper run minimises variability. | Common in multi-tenancy buildings. | Generally reliable; some peak-hour variation. | Quality depends on copper run length and condition. | Higher latency than fibre; avoid for large deployments. | High latency (600ms+) incompatible with real-time VoIP. |
FTTP: The Best NBN Connection for VoIP
FTTP (Fibre to the Premises) delivers optical fibre directly to your building. Because there is no copper component in the connection, FTTP provides consistent, low-latency performance regardless of distance or time of day. For a business that relies heavily on VoIP and cannot tolerate quality variation, FTTP is the preferred connection type. If your current address has FTTP available but your building is not yet connected (particularly in new developments or recently upgraded areas), contact your NBN retailer. FTTP upgrade programs have expanded significantly since 2022 and many formerly FTTN premises can now access FTTP connections.FTTN: The NBN Type That Causes the Most VoIP Issues
FTTN (Fibre to the Node) is the NBN technology that causes the most VoIP problems for Australian businesses. The fibre component runs to a street cabinet (node), and from there a copper telephone line runs to your premises. The length and condition of that copper run determines your line's latency and stability.Copper runs under 300 metres typically perform well enough for VoIP. Copper runs over 600 metres begin to show variable latency. Deteriorated copper, aged joints, and flooded pits can cause significant quality issues regardless of distance. If your business is on FTTN and experiencing VoIP problems, request a line quality check from your NBN retailer.
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If your business is in an area where NBN Co is upgrading FTTN to FTTP (an ongoing program), upgrading your connection type to FTTP is the most permanent solution to NBN-related VoIP quality issues. Check nbnco.com.au or contact your NBN retailer to confirm upgrade availability at your address.
HFC (Hybrid Fibre Coaxial) for Business VoIP
HFC uses the old Foxtel cable TV infrastructure (coaxial cable) for the last leg of the NBN connection. HFC is generally reliable for VoIP in Australian business environments. Latency is typically in the 5-15ms range, which is acceptable for voice. Some HFC areas experience peak-hour congestion due to the shared nature of the coaxial infrastructure, but this is less pronounced during business hours.Fixed Wireless NBN for Business VoIP
Fixed Wireless NBN is primarily deployed in regional and rural areas where fibre connection is not economically viable. The connection uses radio signals from a nearby tower to an antenna on your roof. Latency on Fixed Wireless is typically 30-60ms, which is workable for VoIP but less consistent than fibre options. For businesses in Fixed Wireless areas, a hosted VoIP system will generally work, but complex deployments with many simultaneous calls require testing under real conditions before go-live.The PSTN Copper Shutdown and Your VoIP Transition
Regardless of NBN technology type, Australia's PSTN copper telephone network is being progressively decommissioned. When NBN is available at a premises, a migration period begins during which traditional voice services attached to the copper network are transitioned to VoIP or ceased. If your business has not yet moved to VoIP and has received a copper shutdown notice, see our VoIP vs traditional phone guide and our VoIP phone system guide to plan your migration.How do I find out which NBN technology type is at my address?
Use the address checker at nbnco.com.au. Enter your business address and the result will show your current NBN technology type and any upgrade plans. Your NBN retailer's account portal also typically shows your connection technology type. If you are unsure, contact your internet service provider.
Can I upgrade from FTTN to FTTP for better VoIP quality?
In many cases, yes. NBN Co has an ongoing program upgrading FTTN connections to FTTP in areas where the copper network requires significant maintenance. If your area is included in an upgrade program, you can request the FTTP upgrade through your NBN retailer. The upgrade is typically free, though installation may require an NBN technician visit. Check nbnco.com.au for current upgrade program availability.
My NBN speed test results are good but VoIP quality is poor. Why?
Speed test results measure download and upload throughput, not the latency and jitter that matter for VoIP. An FTTN connection can pass a speed test with 50 Mbps but still have variable latency that degrades voice quality. Run a ping test or use a VoIP-specific quality measurement tool to check latency and jitter rather than relying on a standard speed test.
Does my NBN plan speed affect VoIP quality?
Rarely. Each VoIP call uses approximately 80-100 kbps of bandwidth. Even an NBN25 plan has more than enough bandwidth for multiple simultaneous calls. Upgrading from NBN25 to NBN100 will not improve VoIP quality unless bandwidth was genuinely saturated. The connection technology type (FTTP vs FTTN) matters far more than the speed tier.
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