NBN offers three traffic classes to service providers (TC1, TC2 and TC4), which they use to create products to sell directly to you.
Each traffic class has a different primary purpose
Traffic Class 1 (TC1) – Designed for Business Grade Voice Services
TC1 is primarily used to support voice services, specifically Voice over IP (VoIP), and is designed to provide access to the following features:
A Committed Information Rate (CIR) at the wholesale level – designed to support voice communication quality.
Symmetrical wholesale download and upload speeds – designed to help make voice communication seamless.*
Appropriate wholesale bandwidth allocation – designed to make voice communication cost-effective.
Traffic Class 2 (TC2) – Designed for Business Grade Data Services
TC2 is designed to provide access to high performance data for applications and services that require consistent, predictable download and upload speed requirements – including video conferencing, network traffic over virtual private network (VPN), e-commerce and business-critical cloud services. TC2 has been designed to provide access to the following features:
A Committed Information Rate (CIR) at a wholesale level – designed to help make performance for your data services consistent.
Symmetrical wholesale download and upload speeds – designed to help make interactive applications like video conferencing seamless.*
Defined latency, jitter and loss characteristics – as listed in the Wholesale Broadband Agreement (WBA) helping enable a better business grade service.
Traffic Class 4 (TC4) – Designed for Business Grade Data Services
TC4 is designed primarily for general internet and standard data services and has the following features:
Available across all access technologies.
Asymmetrical wholesale download and upload speeds*
A ‘best effort’ service suitable for non-critical business data applications
