How the nbn™ Ethernet service works
The product provides an Ethernet virtual circuit to deliver Layer 2 packets between the nbn™ access network boundaries, the Network-to-Network Interface (NNI), to the User Network Interface (UNI) at your customers’ premises. The nbn™ Ethernet product is composed of four configurable components. The components act as building blocks for you to tailor the nbn™ Ethernet into your retail offers. The diagram below illustrates our product structure:
Traffic classes
The nbn™access network will feature four traffic classes, to enable you to develop targeted retail offerings for key segments (e.g. the business market, the voice-only or triple-play residential market, etc.). Traffic classes must be ordered on both Connectivity Virtual Circuits (CVC) and Access Virtual Circuits (AVC).
There are four traffic classes:
| Traffic Class | Designed for | Access Technology |
| Traffic class 1 (TC-1) | nbn’s highest priority traffic class. It is delivered as a Committed Information Rate (CIR) with defined latency, jitter and loss characteristics – suitable for applications that require highly deterministic traffic parameters such as voice. | All |
| Traffic class 2 (TC-2) | Provides support for latency sensitive, interactive applications such as video conferencing, converged business collaboration, IPTV or gaming. It is delivered as a Committed Information Rate (CIR) with defined latency, jitter and loss characteristics. | See product roadmap |
| Traffic class 3 (TC-3) | Gives priority to transactional data, such as business applications running on a WAN. It is delivered as a Committed Information Rate (CIR) with defined latency, jitter and loss characteristics. | See product roadmap |
| Traffic class 4 (TC-4) | Designed for browser based applications such as the internet and web browsing. It is delivered in a range of Peak Information Rate (PIR) speeds that are asymmetrical. | All |