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
4-Port FTTP Connection Box
Legacy FTTP Connection Box
FTTC
Plugs into your phone wall socket inside the home.
FTTC Connection Box
HFC
Connects to a cable wall outlet, usually in your living area.
HFC Connection Box
Fixed Wireless
Mounted inside your home and cabled to the antenna on your roof or outside wall.
Fixed Wireless Connection Box
Legacy Fixed Wireless Connection Box
Sky Muster satellite
Mounted inside your home and cabled to the satellite dish on your roof.
Sky Muster Connection Box
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
- TechnologiesWhat is nbn and how does it work?A plain-English explanation of Australia's national broadband network, how it reaches your home, and why your choice of provider still matters.
- TechnologiesFibre to the Premises (FTTP): what it is and what to expectHow FTTP works and why it's the fastest nbn technology type available.
- TechnologiesFibre to the Node (FTTN): what it is and what to expectHow FTTN works, why your copper line and in-home wiring matter, and how to choose a speed tier.
- TechnologiesFibre to the Curb (FTTC): what it is and what to expectHow FTTC differs from FTTN and what the small device outside your home does.
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