Fibre internet options for business: FTTC, FTTP, and DIA explained
August 15, 2025
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5
min read
Highlights
Is your business broadband really what you signed up for? If video calls lag or uploads drag, your connection might not be what you expected. In this blog, we unpack FTTC, FTTP, and DIA - three ‘fibre’ options with very different performance and stability.
If you run a business in the UK, you’ve probably heard of 'fibre broadband'. But what does that mean – and are all fibre services the same?
The short answer: no.
Two companies might both be sold ‘fibre’ but get very different results. Speed, reliability, and consistency vary wildly depending on the underlying engineering.
Why? Because some connections still rely on outdated infrastructure. Others are shared with your neighbours, and often with residential customers too. Most don’t come with the guarantees modern businesses need.
Let’s break down the three most common types of connection you might be offered:
- FTTC
- FTTP
- Direct Internet Access (DIA)
and why the difference between them matters.
1) FTTC (fibre to the cabinet): fibre, kind of
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FTTC runs fibre from your provider’s network to a street cabinet near you, then uses copper wires to reach your premises (while still selling you ‘fibre’).
Copper = outdated. Which means slower speeds, interference, and fluctuating performance – especially if the cabinet’s a few blocks away or shared by lots of users. And those cabinets? They’re exposed to weather and vandalism, adding yet another layer of risk.
FTTC might work for casual browsing, but if your business depends on video calls, cloud platforms, or remote collaboration, expect slow uploads, dropped connections, and no guarantees when things go wrong.
2) FTTP (fibre to the premises): better, but not ideal
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Unlike FTTC, FTTP is a fibre connection that runs straight from the exchange to your building. With no copper cabling involved, it offers better speed and stability.
But here’s the catch: while this is often what internet service providers call ‘business broadband’, you still share your connection with up to 30 others. And while the average speed range is typically quoted as 150 to 900Mbps, the reality is, you often won't always experience those speeds, particularly during peak times because you share your bandwidth with others.
For micro businesses or early-stage start-ups, FTTP may provide a half workable solution, especially as a stepping stone. But be prepared for pixelated, laggy video calls or a long wait to download a pitch deck during busy times and sometimes, for no apparent reason at all.
As we put it in our earlier blog comparing broadband to leased lines: ‘If it’s broadband, it’s shared’. FTTP is still broadband and not something that provides a genuine solution for reliable connectivity.
What to be aware of if you are considering buying FTTP
FTTP can sound a lot like a high-end business service. It’s full fibre. It promises impressive speeds. And it often comes with confident-sounding terms like ‘uptime guarantee’ or ‘symmetrical speeds’. But these features deserve a closer look, because what they offer in theory isn’t always what they deliver in practice.
Take ‘symmetrical speeds’. FTTP can technically offer equal upload and download speeds, but only if the network isn’t busy and your plan allows it. Most of the time, upload speeds drop off when everyone’s online.
Then there’s the ‘uptime guarantee’. Sounds great. But without automatic compensation for downtime or real SLAs, they're often just marketing phrases – not a sign of real accountability. Many providers only commit to a response or investigation window, rather than to actual fix times.
Other elements that sound impressive but don’t necessarily reflect business grade standards. Static IP addresses are promoted as a ‘business’ feature, but these are widely available as standard on home broadband. ‘Priority fault handling’ usually just means you’re ahead of domestic users - not first in line for a fix.
So, while FTTP is better than FTTC, it is still very much part of that ‘broadband’ family. It’s a strong consumer-grade product, but not a substitute for a business-grade connection.
3) Direct internet access (DIA): fibre built for business
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DIA, sometimes known as a ‘leased line’ or ‘dedicated internet’, is a full fibre connection exclusively allocated to a single business. Unlike FTTC or FTTP, it isn’t shared with neighbouring offices or homes, and it isn’t affected by the demands of other users on the network.
It’s your own, dedicated connection, built for performance, reliability, and security.
With DIA, you always get ‘actual’ symmetrical speeds, meaning your uploads are just as fast as your downloads. This makes a big difference for real-time communication, file transfers, and cloud tools. You also benefit from 1:1 contention, meaning your bandwidth is always your own and performance doesn’t drop at peak times - because there’s no one else on your line.
Most importantly, DIA comes with robust service-level agreements (SLAs). These go beyond vague promises, offering clear commitments on uptime guarantees, target fix times, and - with a good provider - automatic compensation if things go wrong.
It’s not just about speed; it’s about having trust in the service that underpins your operations.
DIA is especially valuable in scenarios where reliability directly impacts productivity:
- Cloud-heavy workflows: platforms like Salesforce, Azure, AWS, or cloud CRMs need reliable 24/7 access. Outages or slow speeds mean lost hours and lost business.
- Creative and media teams: agencies and production houses transferring large design files or uploading media to the cloud need fast, stable upload speeds. DIA’s symmetrical performance makes that possible.
- Security-focused organisations: if your business runs VPNs, firewalls, or handles sensitive data, you need a connection that supports uptime and compliance without compromise.
- Hybrid/remote teams: distributed workforces need reliable video calls, collaboration tools, and seamless file sharing. DIA keeps everyone connected – consistently.
Leased line vs broadband, 13 key differences
- Speed
- Broadband: speeds vary, especially during peak times when many users share the line
- Leased line: your own private connection with speeds that never slow down
- Why it matters: faster speeds mean quicker file sharing, uninterrupted calls, and no buffering
- Upload vs download speeds
- Broadband: downloads are fine, uploads are often much slower
- Leased line: equal upload and download speeds (symmetrical)
- Why it matters: reliable speeds make cloud backups, video calls, and sending large files seamless
- Reliability
- Broadband: line shared with others, so performance drops when usage is high
- Leased line: dedicated, uncontested connection that stays consistent
- Why it matters: a steady connection doesn’t disturb business operations and maximises productivity
- Service level agreements (SLAs)
- Broadband: uptime and fix times not guaranteed; outages take longer to resolve
- Leased line: 99.9%+ uptime with fixed repair times, usually within a few hours
- Why it matters: no guaranteed repair times mean more downtime and disruption
- Proactive monitoring
- Broadband: reactive, your provider might prioritise other issues over yours
- Leased line: 24/7 monitoring; problems often fixed before you notice
- Why it matters: proactive fixes mean fewer outages and smoother operations
- Dedicated point of contact
- Broadband: no dedicated contact; expect long calls, chat bots, and slow complaint handling
- Leased line: you get a dedicated account manager you can reach directly, usually within minutes
- Why it matters: faster responses and fixes, no endless chasing
- Latency (the time it takes for data to travel between you and the person or system you’re connecting to)
- Broadband: higher latency and prone to more network congestion
- Leased line: minimal delay for smooth, instant calls, file uploads etc.
- Why it matters: low latency prevents frozen video or slow cloud uploads
- Traffic prioritisation
- Broadband: provider decides what gets priority
- Leased line: you control which activities come first (e.g., video calls, file transfers)
- Why it matters: without control, important tasks can slow during busy periods
- Truly unlimited
- Broadband: “unlimited” may come with data caps or throttling (slowing speeds after a threshold)
- Leased line: No data limits or throttling; full speed at all times
- Why it matters: no data limits mean no surprise slowdowns mid-project
- Installation time
- Broadband: a couple of weeks
- Leased Line: depends on provider; Vorboss offers “Rapid Install” in as little as 48 hours
- Why it matters: slow setup can delay your business getting online
- No phone line required
- Broadband: often tied to phone rental
- Leased line: internet-only, perfect for internet-based phone systems (VoIP)
- Why it matters: save money by ditching old-style phone lines while still making calls
- Cost
- Broadband: cheaper monthly fees
- Leased line: higher cost, but delivers fast, reliable, uninterrupted service
- Why it matters: paying more is worth it if slow internet or downtime is slowing your team, delaying projects, or costing your business money
- Scalability
- Broadband: limited options for upgrading bandwidth
- Leased line: easily upgraded as your business grows
- Why it matters: leased line supports business growth without needing a completely new internet connection
At a glance: FTTC, FTTP, and direct internet (DIA)
The right fibre for the right job
FTTC, FTTP and DIA each have their place, but they’re not interchangeable. Unfortunately for many businesses, the differences become visible the moment the connection is put under pressure.
For businesses in this day and age, FTTP and FTTC are not fit for purpose. And being overly reliant on outdated infrastructure costs London businesses billions a year in outages.
DIA (whether you call it a leased line or dedicated internet) is designed with business in mind. For teams working in the cloud, relying on uptime or collaborating in real time, it offers a level of confidence that shared broadband simply can’t match.
Choose with care. The best internet solution is the one that will support the way your business works not only now, but also as it grows.
If you want to find out if DIA is right for your business, get in touch with our team. We're always happy to chat through your options.
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More articles
Business broadband vs leased line: the key differences?
Expert conclusion: The label ‘business broadband’ doesn’t really mean anything – the term covers a wide range of services, each with very different experiences. Get into the details, and save yourself a lot of frustration and disappointment.
Broadband vs leased line explained
- Broadband: A standard, shared internet connection typically designed for home use, but sometimes used in small offices. Speeds can vary, especially during busy times, and upload speeds are often much lower than downloads – which can limit performance for modern business applications.
- Leased line: A private, dedicated connection between your premises and your provider. Symmetrical speeds, guaranteed performance, and no sharing with neighbours - specifically designed to meet the demands of modern business connectivity.
What is business broadband?
Most of the time, it’s just the same product as the ISP (Internet Service Provider) sells to their residential customers, but more expensive and probably bundled with a low-level cyber security product.
It has a dedicated web page, with stock photos of people doing business. And it comes with some comforting words to tell you that they know how hard business is. Excruciating.
Your traffic isn’t prioritised. Your connection isn’t dedicated. And if you have an ‘account manager’, they’re probably responsible for literally thousands of customers like you.
If you pay more, you might get a commitment to investigate faults within a given time – usually within a day.
When you’re looking for business broadband, bear these things in mind. Look at the details to see if you’re simply being sold a standard home broadband package disguised as a business solution.
What does great internet connectivity for business look like?
It’s very easy to call something business broadband. But it’s a very different thing to provide internet connectivity that’s genuinely fast and reliable enough for London business in 2025.
One of the fundamental features of an internet product for business is a dedicated connection.
‘Broadband’ or ‘FTTP’ (that’s Fibre to the Premise) means that the service you’re paying for is shared between you and typically 30 of your neighbours – whether they’re houses or other businesses.
So when you have a broadband or FTTP connection, don’t expect to get the Gbps speeds you’ve paid for at busy times (which is most of the working day). It’s cheap, and it connects. But it’s not a product that you can rely on to keep your business running.
At the busiest times, you'll have to hope that it’ll give you what you need. That might mean putting up with a poor-quality video call, a painful wait downloading a PowerPoint, or an eternity for every employee to log in to Teams at 9am.
Internet connectivity that you and your business can rely on is going to be dedicated to you, and that means taking a leased line (also knows as DIA, or direct internet access).
What is the difference between business broadband and business leased line or ‘dedicated’ internet (DIA)?
One word: reliability.
That’s the key difference between the experience of these two technologies: how much you can rely on your connection, and how that impacts your business. We see it in every customer interaction as they move from broadband to direct internet – the shackles are off.
While business broadband infrastructure is shared with the businesses and houses around you, leased line (or direct internet) infrastructure is dedicated to you – it isn’t shared with anyone.
It’s your connection, and every bit of the bandwidth you’re paying for is yours. It’s guaranteed. Always giving you the internet speed and capacity you need, no matter how busy things get.
The whole Manchester office coming down for a team day? No problem. Sending a broadcast-quality video file to a client on a deadline? Easy. Worrying about signing up to a new cloud-based software for project management? Don’t. Putting the CEO on a video call that has to be perfect? Do it.
A 10Gbps leased line ensures you always have the speed you need. It’s a service you and your business can rely on.
What are the key features of business leased line and business broadband?
Leased line:
• Dedicated to one customer – a dedicated, private cable between your office and your provider's data centre
• Symmetrical – you get the same upload speed as download speed
• Highly reliable
Broadband:
• Shared circuit by up to 32 users
• Usually asymmetrical – upload typically much slower than download
• Prone to performance issues, particularly during the working day
The technology explained
We’ve covered the difference in experience, but what’s the technology difference?
A ‘leased line’ is a dedicated fibre connection between your office space and your provider’s spot in a data centre (often called a Point of Presence, or PoP). This is where your connection reaches the internet or cloud.
Your proximity to the provider’s data centre is important for latency – which is the speed at which things happen online. It’s not to be confused with upload and download speed, which is how long content takes to get to/from you. It’s more like how quickly the order you give is obeyed.
Two more important features of a leased line network are how many data centres your provider connects to, and how many diverse routes they have between you and those centres.
More than one data centre, and numerous routes equals resilience. And resilience is vital in business internet connections. If one route gets blocked, your data has alternative routes so there's no disruption.
Leased lines use fibre, but they’re not like residential broadband as the fibre line isn’t shared. You’ll often read about leased lines being called Ethernet, but the main terms to look out for are Leased line or Direct Internet Access (DIA).
A broadband connection is typically PON-based – that’s passive optical network, and relates to the way in which ‘splitters’ are used to connect multiple customers to the same fibre. It’s a revolutionary technology when it comes to delivering fibre to multiple homes, where super low cost is the main driver. But for business, it’s ‘best effort’, at best.
It’s cheap to deliver, and so it’s relatively cheap to buy. But it comes with the reality that you cannot rely on it. If the other homes or businesses on your fibre are using the network, then you’ll suffer.
What are the benefits of a leased line?
A dedicated connection means guaranteed bandwidth
With a leased line, you get every bit you pay for, unlike a shared ‘broadband’ connection, where you can pay for 1Gbps but it’s highly unlikely you’ll ever see that speed.
A connection you can rely on
Always the speed you’ve paid for and infrastructure that’s backed up by an SLA (Service Level Agreement) – and automatic compensation if you choose a really good ISP. And the ability to order a back-up line, to increase the resilience of your service.
Lower latency
The more direct architecture and quicker route to a data centre (where your connection hits the internet) means a leased line will almost always offer lower latency than a broadband connection.
Upload that matches download
Most broadband, FTTP and cable services advertise the download speed but keep quiet on upload – that’s because upload is significantly slower in these services, often as little as a tenth of the speed. Leased lines have ‘symmetrical’ download and upload.
Enhanced security
Security can never be taken for granted, so check on the Infosec and compliance qualifications of your provider – typically, those selling residential-grade services won’t invest in this area, but serious business providers recognise the huge benefit to their customers.
A feature comparison
Breach breakdown
In April 2025, Marks & Spencer (M&S) was hit by a serious cyberattack, and not by amateurs. The group behind it, known as Scattered Spider (also known as UNC3944 or Octo Tempest) has a track record. They’ve already taken on major U.S. giants like Caesars Entertainment and MGM Resorts.
Our 40Fi DFND team has done a deep dive into what happened and, more importantly, how businesses like yours can stay protected.
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Want practical, jargon-free cybersecurity advice tailored for your business?
Join our free workshop with the City of London Police. Register now.
How they got in
Scattered Spider used smart, targeted phishing emails and impersonated IT staff to trick people into handing over their credentials. They even used a tactic called "MFA fatigue", which consisted of spamming employees with repeated login requests until one was mistakenly approved.
Threat intelligence researcher, Lontz reported on suspected Scattered Spider infrastructure (see figure 2), involving fake domains designed to mimic legitimate login pages of well-known websites. A spoofed company login page could have been created to get access to M&S employee login details.
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What happened after they got in
Initial access to M&S systems is believed to have been as early as February. Once in, the attackers used stolen administrative credentials to deploy legitimate remote administration tools (RATs). This gave them ongoing control over key systems (including employee devices), helping them stay hidden while moving through the network.
Here's what they did:
- Installed remote desktop access tools like AnyDesk and TeamViewer - the same kind real IT teams would use
- Moved around through different M&S’s internal systems to grab as much data as possible
- Targeted critical assets like password databases and user credentials
Finally, they created secret access points, hidden accounts, and scheduled tasks to make sure they could stay inside the company's network without getting noticed.
The attack
On April 24, Scattered Spider launched the DragonForce ransomware attack on M&S’ VMware ESXi servers, encrypting virtual machines that powered key systems for e-commerce, payment processing, and logistics (see figure 3).
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As a result, M&S had no choice but to shut down key systems entirely (including online orders and contactless payments), and call in top cybersecurity experts from CrowdStrike, Microsoft, and Fenix24 to contain the damage and start the recovery process (see figure 4).
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What this means for you
While M&S is a major player, the tactics used in this breach aren’t just for corporations, they work just as well against small businesses. Groups like Scattered Spider rely on common tools and stolen identities to gain trust and slip past normal security. The key lesson? Always verify the people and systems you rely on, whether they’re inside your team or external partners.
What you can do to improve cybersecurity for your business
5 quick wins to protect your business
- Train your team – teach employees to spot dodgy emails, spoofed links, and sketchy login pages.
- Use strong passwords – create long, complex passwords that include a mix of uppercase and lowercase letters, numbers, and special characters. Never reuse passwords across different accounts.
- Enable multi-factor authentication (MFA) – this adds an extra layer of security beyond just a password.
- Stay vigilent – do not open email attachments or click on links unless you are certain of their legitimacy. If you have any doubts, report the email to your security team immediately.
- Report suspicious activity fast – if you receive unexpected MFA prompts, suspicious login alerts, or calls requesting your credentials, report them to your security team as soon as possible.
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