Network Termination Device (NBN)


A Network Termination Device is a customer-side network interface device used by the Australian National Broadband Network. Network termination devices provide multiple bridges for customers to access the NBN. There are different types of NTDs for the various connection technologies encompassed by NBN. All connection types except FTTN use NTDs on premises. Depending on the kind of link, NTDs typically provide two telephony and four data channels. An external power source is required, and an uninterruptible power supply can be used to maintain connection in power outages. FTTC requires power to be provided from the premises to the kerb.
NTDs provide user–network interface connections for connection of in-premises devices. They typically have multiple RJ45 jacks for the UNI-D connection, and some models have RJ11 jacks for the UNI-V connection. All NTDs are capable of passing VoIP traffic. FTTN requires premises to have a compatible VDSL2 modem. Each UNI-D port can be activated by retail service providers for different NBN services. The NTD cannot be used as a Layer 3 router for in-premises networking.
Most devices used in NBN are produced by Alcatel-Lucent, currently a division of Nokia Corporation. In FTTC networks, the hardware from domestic manufacturer, NetComm, are used, and in HFC networks from Arris, currently a division of CommScope. FTTN networks, based on VDSL2 technology, can be accessed with any compatible modem or router that supports VDSL2. NBN itself doesn't sell any VDSL2-compatible hardware and it must be supplied by end-user of the network.

Network technologies

TechnologyModelUpstream protocolUNI-V jacksUNI-D jacksAlternative namesNotes
FTTPAlcatel-LucentGPON24
FTTNNone VDSL210May have a 600 series plug in place of UNI-V
FTTCNetComm NDD-0300VDSL201Network connection device or FTTC connection device. FTTC was previously known as fibre to the distribution point.
  • May have 600 series plug in place of UNI-V
  • A distribution point unit is located near the property boundary inside a pit on the street and can service up to 4 connections.
  • The DPU is powered from the mains-powered NTD at each premises
HFCArris CM8200DOCSIS 3.002Typically only one UNI-D port is used
Fixed wirelessAlcatel-LucentLTE04NBN connection box or indoor unit Where a plain old telephone service is in place, this can be kept
SatelliteViaSAT Residential Broadband Terminal 124004Indoor unit
  • Where a POTS connection is in place, this can be kept
  • Part of the very small aperture terminal system

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