Nbn Traffic Classes

What is the difference between NBN Traffic Classes?

NBNCo offers wholesalers three traffic classes.

  • TC-4
  • TC-2
  • TC-1


Traffic Class 4 is the standard, ‘best-effort’ service that most people are familiar with. TC-4 is suitable for most general purpose applications, but offers no guaranteed bandwidth. Speeds are asymmetrical.

  • 12Mbps / 1Mbps
  • 25Mbps / 5 Mbps
  • 25Mbps / 10Mbps
  • 50Mbps / 20Mbps
  • 100Mbps / 20Mbps
  • 100Mbps / 40Mbps
  • 250Mbps / 25Mbps
  • 250Mbps / 100Mbps

NBN Fixed Wireless services support only 12/1, 25/5 and 50/20 plans. Speeds over 100Mbps require Fibre to the Premises.


Traffic Class 2 offers symmetrical download and upload speeds with a guaranteed minimum Committed Information Rate (CIR) and maximum latency, jitter and packet loss.

Zero Point Networks doesn’t offer Traffic Class 2 services, as these requirements are met by our Enterprise Ethernet solutions


Traffic Class 1 is designed for Business Voice services. It guarantees the full amount of bandwidth will always be available.

1 fixed phone line
Up to 2 concurrent phone lines
Up to 3 concurrent phone lines
Up to 6 concurrent phone lines
Up to 12 concurrent phone lines
Up to 25 concurrent phone lines

What should we use?

For most small businesses, TC-4 NBN is adequate, but if you rely heavily on your phones it may be worth considering a dedicated TC-1 NBN connection for your phone system. If an interruption to your Internet service would cost you money, consider SD-Internet or Enterprise Ethernet.

If you’re not sure, reach out to us to discuss your requirements.