Skip to main content

Category: Technologies · Last updated 25 Sept 2026

What is an nbn Connection Box and what does it do?

The small box that connects the nbn network to your home network, explained.

The nbn Connection Box is the point where the nbn network ends and your home network begins. It's supplied by nbn Co (not Lightning IP) and is used on FTTP, FTTC, HFC, Fixed Wireless and Sky Muster satellite connections.

Depending on your connection type, you may also see it called:

  • NTD (Network Termination Device) on FTTP, HFC, Fixed Wireless and Sky Muster connections
  • NCD (Network Connection Device) on FTTC connections

FTTN connections don't use an nbn Connection Box. Your modem plugs straight into the phone wall socket.

What an nbn Connection Box looks like

It's a small box, usually white. Where you'll find it and how it's connected depends on your technology type. Select any image to view it full size.

FTTP

Usually mounted on an internal wall, in a garage or in a communications cupboard. It connects to the fibre line coming into your home.

1-Port FTTP Connection Box

Front view: 1-Port FTTP Connection Box, front view

Port view: 1-Port FTTP Connection Box, port view

4-Port FTTP Connection Box

Front view: 4-Port FTTP Connection Box, front view

Port view: 4-Port FTTP Connection Box, port view

Legacy FTTP Connection Box

Front view: Legacy FTTP Connection Box, front view

Port view: Legacy FTTP Connection Box, port view

FTTC

Plugs into your phone wall socket inside the home.

FTTC Connection Box

Front view: FTTC Connection Box, front view

Port view: FTTC Connection Box, port view

HFC

Connects to a cable wall outlet, usually in your living area.

HFC Connection Box

Front view: HFC Connection Box, front view

Port view: HFC Connection Box, port view

Fixed Wireless

Mounted inside your home and cabled to the antenna on your roof or outside wall.

Fixed Wireless Connection Box

Front view: Fixed Wireless Connection Box, front view

Port view: Fixed Wireless Connection Box, port view

Legacy Fixed Wireless Connection Box

Front view: Legacy Fixed Wireless Connection Box, front view

Port view: Legacy Fixed Wireless Connection Box, port view

Sky Muster satellite

Mounted inside your home and cabled to the satellite dish on your roof.

Sky Muster Connection Box

Front view: Sky Muster Connection Box, front view

Port view: Sky Muster Connection Box, port view

How your modem connects to it

Your modem/router plugs into the nbn Connection Box with an ethernet cable. On an NTD, this is usually a port labelled UNI-D. On an FTTC NCD, it's the port labelled Gateway. This is different from older ADSL setups, where the modem plugged directly into a phone line.

The nbn Connection Box is owned and maintained by nbn Co, not Lightning IP. If it's faulty, we lodge the fault with nbn Co on your behalf. You don't need to (and shouldn't try to) open or repair it yourself.

Related Articles

Was this article helpful?

Your feedback helps us improve our support content.