Broadband vs Fibre vs Dial-Up | The Difference Explained

You probably hear the terms “broadband,” “fibre” and “dial-up” all the time. But what are the exact differences between these words?

In this piece, we’ll explain the differences between some of the common internet jargon you’re likely to hear when shopping for a new broadband plan.


First, let’s take a look at what each term actually means.


This word has taken on a completely new meaning since the invention of high-speed internet.

In the past, broadband simply referred to methods of transmitting data that used a broad range of frequencies and transmission bands. Hence the term “broadband”.

These days though, it’s used to refer to home internet connections that are significantly faster than dial-up. You’ll see it used by major telecommunications companies to sell their medium-speed internet plans (typically with an 11-36Mbps download speed). But it may also be used when advertising faster broadband plans, which providers might call “fibre broadband” or “superfast broadband”.


Fibre optic cable.
This is what fibre-optic cable actually looks like.

Fibre on the other hand has a much more simple definition.

This word refers to fibre-optic cable, which is what is used to supply modern internet connections. Data is transmitted as pulses of light along a fibre optic cable, allowing for incredibly fast download and upload speeds – since information can travel at the speed of light. This is where the “fibre” in “fibre broadband” comes from.


For all the young people out there who never had to experience dial-up, it was basically snail-pace internet.

Regular phone lines were used for data transmission, which made uploading and downloading very slow. The modem had to physically “dial up” the internet service provider (ISP) in order to establish a connection (which is why you always heard a beeping noise as it connected).

Dial-up internet offered a maximum download speed of 0.056Mbps. For comparison, the average download speed in the UK is currently more than 50Mbps.

Difference between broadband and fibre

An ethernet cable using for delivering a broadband connection.

Fibre is a specific type of broadband that allows you to achieve faster internet speeds. While broadband is a broader term referring to the communication technology you use to get online, fibre refers to the use of fibre-optic cables to deliver a broadband connection for at least part of the journey. Broadband can also be delivered using copper cabling rather than fibre.

Since fibre-optic cables allow for faster data transmission than copper, fibre broadband is faster than regular broadband.

Regular broadband typically uses an ADSL connection. Asymmetric Digital Subscriber Line (ADSL) broadband offers download speeds of up to 11Mbps. Fortunately, most households in the UK now have access to fibre, rather than ADSL broadband, meaning they can get download speeds of at least 36Mbps.

The speeds of fibre broadband can vary quite substantially, from 36Mbps all the way up to 1000Mbps or even higher, depending on how the fibre is used. For example, if fibre is only used up to the cabinet in your street (known as fibre to the cabinet, or FTTC), then your speeds will be slower than if fibre is used all the way to the building (FTTB).

Difference between broadband and dial-up

Dial-up and broadband refer to different means of accessing the internet. Dial-up was the predecessor to broadband internet technology.

Dial-up internet was extremely slow by modern standards. While both dial-up and broadband can be delivered using copper cabling, through your phone line, broadband can also use fibre technology to achieve significantly faster speeds. However, even standard ADSL broadband, delivered through your phone line, is significantly faster than dial-up internet was.

Since these two terms are completely separate, there is no such thing as dial-up broadband. The two main types of broadband are ADSL broadband (including other similar technologies such as VDSL) and fibre broadband.

Difference between dial-up and fibre

Fibre optic cable.

Dial-up and fibre are completely different types of broadband technology.

While dial-up used the copper phone network infrastructure to deliver an internet connection, fibre (also known as fibre broadband) uses fibre-optic cables for at least part of the journey. As a result, fibre broadband often delivers download speeds 900 to 18000 times faster than dial-up internet was ever able to provide.

Fibre broadband is the current standard being rolled out across the UK. On the other hand, the last dial-up internet connections were shut down by BT in September 2013.


Hopefully this guide helped to make the difference between dial-up, broadband and fibre a little more clear.

You may also be interested in our other terminology guide, explaining the difference between broadband, internet, and Wi-Fi.

If you’ve got any questions about what these words mean, please leave a comment below and we’ll get right back to you.

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