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Lease Line vs FTTC: Which is Best?

A leased line and Fibre to the Cabinet (FTTC) are both types of broadband connections businesses can use. Both types offer businesses distinct advantages, and each comes with certain drawbacks.

Birmingham Telecom sets up businesses with each broadband connection, and we are here to guide you on which is best for your company. The debate of leased line vs FTTC broadband comes down to several criteria, including speed requirements, existing infrastructure, cost, availability and scalability.

Let’s dive into the differences, benefits and drawbacks of each and find out which connection is the ideal choice for your business needs.

What Is FTTC?

FTTC stands for “Fibre to the Cabinet”, and is a broadband connection that uses fibre optic cables running from a provider’s distribution centre to a street cabinet. From the cabinet, regular copper phone lines are used to reach the business’s premises. While speeds are fast, this results in ‘best-effort’ speeds:

  • Up to 80Mbps download
  • Up to 20Mbps upload

Connection speeds are also affected due to it being a contented, or shared, service. While it is far superior to copper only ADSL broadband, FTTC is not a private line dedicated for your sole business. Instead, it shares the local street cabinet and performance can be slower, especially during peak times.

However, FTTC broadband comes with several benefits for businesses. It’s generally a lower cost connection and takes far less time to install compared to leased lines, and is ideal for small businesses with moderate internet needs, such as general browsing, email and light cloud access.

What Is a Leased Line?

A leased line is a dedicated, uncontended connection that delivers symmetrical upload and download speeds directly to a business. This means that both upload and download speeds are the same, with ultra fast speeds of up to 10Gbps (10,000Mbps). Compared to FTTC, a dedicated leased line isn’t shared with any other premises, providing far more reliability and uninterruption.

Also, leased lines often come with Service Level Agreements (SLAs), and while they cost far more than FTTC, you get more bang for your buck. SLAs often include support for fault restoration, advanced security, 24/7 monitoring and seamless connection to VoIP phone systems and remote working needs.

A leased line is ideal for mission-critical business use, where higher speeds and guaranteed reliability is a must. One of its biggest benefits is that it can be scaled in line with business growth, as bandwidth and cloud usage can be increased on demand.

Feature Comparison Table

Feature

FTTC (Fibre to the Cabinet)

Business Leased Line

Connection Type
Fibre optic cables from exchange to street cabinet. Copper lines from cabinet to business premises. Performance depends on distance.
Dedicated fibre optic connection from exchange to business premises.
Speed

Up to 80Mbps download. Up to 20Mbps upload (variable).

Symmetrical speeds of up to 10Gbps (guaranteed)

Cost

Lower monthly cost.

Higher cost reflecting reliability, installation and guaranteed speeds.

Performance
Can be slow during peak times.
Consistent, guaranteed speeds at all times.
Reliability & SLA
‘Best-effort’ service, limited SLA.
Consistent performance with strong SLA for fast fault resolution.
Upload Capability
Limited upload speeds (up to 20Mbps).
High upload speeds (up to 10Gbps) for cloud applications and VoIP.
Scalability
Limited by the speeds FTTC provides.
Very easy to scale as your business grows (depending on contracts with providers).
Contention
Shared with other local users.
A dedicated, uncontended connection for your business.
Installation Time
Typically quicker to install, with either site visit or remote activation (7-10 working days).
Longer install due to dedicated fibre cable installation. If fibre is already available on site, installation may be quicker (40-90 days).
Best For
Small businesses with light internet usage, such as for emails.
Businesses needing high uptime, VoIP installation, managed business Wi-Fi and cloud-based services.

Choosing the Right Option for Your Business

Choosing between leased line vs FTTC for your business isn’t a decision to take lightly. We’ve compared the features of each, but you should also ask yourself these questions to help you make the right choice.

Do you rely on cloud apps and remote access?

If your team spends most of its time in cloud-based tools like Microsoft 365, CRMs or cloud accounting platforms – and especially if staff regularly work remotely, consistent upload performance matters. FTTC can handle light to moderate cloud use, but its shared bandwidth and lower upload speeds may start to feel restrictive as usage grows. A leased line, with symmetrical speeds, keeps access fast and predictable no matter how busy your network gets.

Is VoIP or real-time communication critical?

For businesses using VoIP phones, video conferencing or live collaboration tools, stability and low latency are essential. FTTC generally performs well for occasional calls, but contention at peak times can affect call quality. Leased lines are designed for real-time traffic, delivering clearer calls and smoother meetings.

How important is near-100% uptime?

If internet downtime would seriously disrupt operations, this is a key deciding factor. FTTC comes with ‘best-effort’ service levels, while leased lines include strong SLAs and rapid fault resolution, often with guaranteed fix times.

In practical terms, FTTC may be enough for small teams, startups or offices with modest connectivity needs. Investing in a leased line makes sense for growing businesses, multi-site organisations or any business where performance and reliability are a must. Some businesses opt for a hybrid setup, where FTTC is a cost-effective backup to a primary leased line for added resilience.

Ready to Upgrade Your Business Connectivity?

The winner of leased line vs FTTC broadband will always be decided based on individual business needs. Whether you’re comparing the two types of connectivity or planning a full telecoms upgrade, Birmingham Telecom is here to advise and help you make the switch to the perfect business broadband. We can also get you fast managed business WiFi to handle all your devices and critical applications.

Contact our team today to discuss our options, all with competitive prices and UK-based support.

Birmingham Telecom Team

FAQs

FTTC (Fibre to the Cabinet) is a shared service with variable and limited speeds. A leased line is a dedicated connection using fibre optic cables for guaranteed bandwidth and performance.

Leased lines are considered more reliable than FTTC. Leased lines also come with strong SLAs, meaning fault resolution is quick, whereas FTTC has a ‘best-effort’ service level, where fault resolution is slower. As FTTC is a shared connection, performance during peak times can be affected.

FTTC can be suitable for basic VoIP and cloud usage with smaller teams, but leased lines offer better support for high-demand VoIP installations and multiple users.

If your business crucially needs consistent performance and guaranteed symmetrical speeds, especially for video conferencing, cloud backup and remote access, investing in a leased line is highly worth it. You can also easily scale up with a leased line, providing a worthwhile ROI.

FTTC generally can be installed within a few weeks, either onsite or remotely. A leased line can take a few months, depending on availability and cable installation.

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