Learning about the NBN can be daunting. The information is full of tricky terminology and awkward acronyms. We're here to help, though, and the first thing you should know is this:
You can’t choose how your NBN is connected, it’s dependent on where you live and the infrastructure that is in your area.
Even though there are seven NBN connection types, your house can only connect in one way, and we’re betting that you’re reading this because you've got (or will have) a Fibre to the Building (FTTB) connection.
If you're not sure, you can use our address checker below:
In this guide, we'll explain what FTTB NBN is, how to pick a plan that's best for you, and how to get up and running.
What is Fibre to the Building?
Fibre to the Building or "Fibre to the Basement" is an NBN connection type specifically designed for apartment blocks and large office buildings. With a Fibre to the Building connection, an NBN fibre optic cable is laid directly to the bottom of your building, where it connects to the copper phone line that runs into your apartment or office.
Before we start, here are the cheapest NBN plans in our database on NBN 25, NBN 50, NBN 100/20, and NBN 100/40 speed tiers.
How fast is FTTB NBN?
Fibre to the Building connections can achieve speeds of up to 100Mbps. If you have an FTTB connection, the fastest NBN speed tier you can get is NBN 100. Faster speed tiers like NBN 500 aren't available to FTTB customers.
| Speed tier | Best for | Max. speeds |
|---|---|---|
| NBN 12 | Lone, low internet users | 12Mbps |
| NBN 25 | Budget pick for 1-2 people | 25Mbps |
| NBN 50 | All-rounder for small households of 2-4 people | 50Mbps |
| NBN 100 | For WFH and larger households | 100Mbps |
| NBN 250 | Faster speeds for WFH and larger households | 250Mbps |
| NBN 500 | Seamless internet experience when everyone is online | 500Mbps |
| NBN 750 | Even faster speeds for simultaneous use | 750Mbps |
| NBN 1000 | The fastest speeds you can get for less than $100 per month | 1000Mbps |
| NBN 2000 | The fastest speeds you can get right now, at a premium | 2000Mbps |
The table above illustrates what a good speed is and what average speeds are for each NBN speed tier. However, the actual speeds you get at home will still be dependent on:
- Your specific NBN plan and provider
- Congestion during peak hours (this is what is meant by 'typical evening speeds')
It's also important to note that your NBN speed is a shared resource. If you subscribe to an NBN 50 plan, your 50Mbps is shared between every person and device in your household.
For example, if you're streaming a movie on Netflix, the internet will be slower for everyone else using your connection at the same time. Faster NBN speeds mean there's more capacity to share: you can stream all the video you want, and no one else will notice any slowdown.
Here are the fastest NBN 100 plans you can get at the moment.
What equipment do I need for a FTTB connection?
Since Fibre to the Building uses your existing copper wiring, you'll keep using the same phone line that was once used as part of an ADSL connection. The NBN does not need to install any new equipment in your home as part of the rollout.
For an FTTB connection, you will need a VDSL2-ready modem router. If your modem router doesn't support VDSL2 connections, it won't work with your new NBN internet connection.
To check the compatibility of your modem, look at the row of ports across the back of your modem to locate a phone jack labelled VDSL. If not, look under the modem for a label with a serial number. Most compatible modems will say 'ADSL2+/VDSL2' or something similar.
Most modems sold in the last couple of years would be VDSL2-ready. When you sign up for a new NBN plan, you will almost always have the option of buying a VDSL2-compatible modem with your plan. If you've already got one, you can bring your own.
A handful of providers, including Telstra, Optus, and TPG will provide a VDSL2-ready modem at no additional cost as part of your plan when you remain connected for a certain period. Usually, this is either 24 or 36 months.
Once you have your modem, your NBN connection will be easy to set up. Once your service is active, you simply use an RJ11 phone cable to connect your modem router to the phone socket. Almost every single modem router includes one of these in the box. VDSL2 modem routers also require a dedicated power source, so you'll need a spare electrical outlet.
Your other devices will connect to your VDSL2 modem router using Wi-Fi or a wired Ethernet connection.

How much does FTTB NBN cost?
How much an FTTB plan costs depends on which provider and speed you plan to go with, and prices are constantly changing. While big-name brands such as Telstra, TPG and Optus all have their own NBN plans, the best deals tend to come from smaller providers - some that you have probably never heard of.
The current in-market trend right now is for telcos to offer plans with discounts that last for six months, after which the plan returns to full price.
However, most providers have no lock-in contract and allow you to BYO modem. This means you're free to shop around for the best (or next best deal) every six months.
Dylan Crismale, Digital Content Editor
Generally speaking, the faster the speed tier the more you will pay per month. For most, we'd recommend going for an NBN 50, as they provide a good balance between price and speed. On average, you're looking at about $80 to $90 per month. But the cheapest NBN 50 plans go for around $60 a month with a promotional discount.
As a starting point, here's a look at the cheapest NBN 50 plans around:
How does FTTB NBN work?
The National Broadband Network is made up of fibre optic cables that run out across the country from major hubs and into your neighbourhood. These cables are capable of delivering incredibly fast and reliable internet.
In a Fibre to Building Connection, the NBN's fibre optic cables run directly to a Main Distribution Frame (MDF), usually located at the bottom of a building. Your apartment or office then connects to the MDF using the same copper wiring that was originally for a landline phone and ADSL broadband.

While NBN Co has received criticism for using Australia's old copper network, homes and businesses connecting over FTTB should see faster, more reliable connections. Using large lengths of copper to deliver internet access can result in speed degradation; the longer the copper, the slower the internet. But since only a small amount of copper is required to get you online using Fibre to the Building, you shouldn't lose any speed - provided your building's internal wiring is in good shape.
This essentially makes FTTB a better version of Fibre to the Node (FTTN), where up to a kilometre of copper can be required to connect your house or business to the NBN.
The small amount of copper used also means these connections could be upgraded for faster speeds in the future. In the past, NBN Co has been able to achieve speeds of up to 600Mbps when trialling upgrades to FTTB technology. There is presently no upgrade path for customers on FTTB, however.
Can I change NBN connection type?
If you're not a fan of your FTTB technology, then you can change your technology type, but it's going to cost you.
NBN Co offers free quotes to upgrade your technology type, but beware that these come up in the tens of thousands of dollars. A free quote may also not be possible if NBN considers your premises to be "complex" enough that it requires manual assessment.
An NBN upgrade program is underway, but it's focused on fixing FTTN and FTTC connections rather than FTTB. Over five million FTTN and FTTC households can now request a free upgrade to FTTP, but FTTB connections are excluded.
Non-NBN FTTB alternatives
FTTB internet is unique because you can get a few kinds of Fibre to the Building connections that have nothing to do with the NBN. The majority of private fibre networks - such as those owned by Vocus or Opticomm - use the same or similar technology as FTTB NBN does.
The main difference, however, is that these connections can offer faster speeds. For example, there's Vision Network private fibre, offered by providers like TPG and iINet. TPG offers FTTB plans as fast as 500Mbps over the Vision Network, which is five times faster than what you can get on NBN. The main downside is private fibre networks simply aren't as available as the NBN. You can only get a TPG FTTB plan at around 400,000 premises.
Here are TPG's FTTB plans:
And here are fibre plans from providers using Opticomm's network across different download speeds:
Wireless FTTB alternatives
If you want faster download speeds but can't get a different type of FTTB connection, there's still hope. The easiest option is a 5G home wireless internet plan. These connections use the same mobile network as your phone does in order to connect to the internet.
5G isn't universally available yet, so far, a handful of telcos offer 5G home internet plans at different speed caps. Here's a selection of popular 5G home internet plans:
If you choose a plan with speeds up to 25Mbps, you'll get the equivalent of an NBN 25 plan. Speeds may be slower during peak hours. These plans may not be the best value in the long term as they're quite expensive for the speeds you get. It is worth noting Vodafone's plan has a maximum speed of 20Mbps.
Here's pricing for 5G home internet plans with speeds up to 25Mbps:
If you decide to choose a plan capped at 50Mbps, this means it's the equivalent of NBN 50, however, you may experience slightly slower speeds during peak hours. This is a great option if you're either conscious of the price or you know you won't use over 50Mbps.
Here's pricing for 5G home internet plans capped at 50Mbps:
If you choose a plan capped at 100Mbps, this means it's the equivalent of an NBN 100 plan, however, you may experience slightly slower speeds during peak hours. This is a great option for households with multiple members who regularly connect to the internet at the same time.
Here's pricing for 5G home internet plans capped at 100Mbps:
Three telcos currently offer uncapped plans. These can go as fast as network conditions allow but exact speeds will depend on your coverage and congestion. Generally, though we have found 200Mbps is a pretty safe average.
If you can't get 5G home internet but still don't want NBN, you can consider 4G home internet, also known as home wireless broadband. These plans only offer download speeds of 20Mbps, however, so they'll be a downgrade for anyone with FTTB NBN.
NBN FTTB FAQs
Who is connected to FTTB NBN?
If you live in an existing apartment block that was connected to the internet with an ADSL connection, there's a good chance you've ended up with FTTB NBN. When it comes to new developments, the technology used to connect the building will depend on its size and how much the developer is willing to pay. NBN Co will wire buildings with Fibre to the Building, and it is up to the developer as to whether individual units connect with fibre cabling, HFC, or copper.
What happens in a power outage?
When you're connected to the NBN over FTTB, landline phone and internet services won't work if there is a power outage at your place or within the NBN network itself. Restoring power to your premises with an alternative power option won't do anything if the NBN network is also experiencing an outage.
What happens to my home phone?
Customers on FTTB will make phone calls over the internet. Home phones will connect to 'UNI-D' phone services, provided by your internet supplier.
You will plug your handset into the UNI-D port on a VoIP-compatible modem router – which your provider will be able to send to you. You might also connect with a VoIP adapter connected to your existing telephone socket or an ATA (analogue telephone adapter) connected to your NBN Connection Box.
Be aware that UNI-D does not allow for emergency power backup in the case of a blackout. If the power in your home, building or neighbourhood goes down, so will your phone line. You will also lose landline connectivity if the NBN goes down. For this reason, if you don't already have a mobile phone, we recommend that you keep one charged in your home in case of an emergency.
Fortunately, these days there are plenty of affordable mobile handsets and plans around, offering options to get as much or as little calling credit as you think you might need. You can use your mobile plan as an alternative to VoIP. Or you can get a 365-day expiry prepaid mobile plan to use as an emergency backup in case of a power or internet outage.
Do I have to sign a contract for FTTB NBN?
No, you shouldn't have to sign a contract as most providers now offer month-to-month plans with no lock-in contract However, signing up for a month-to-month plan often means paying for setup and/or hardware, which telcos tend to waive when you commit to a longer-term contract.
Alex Choros
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