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Internet requirements stretch way beyond the capability of broadband?

You need a dedicated internet access service.



Exceptional upload and download speed with ultra-low latency

  • You don’t share your speed with anyone so you get exceptional speeds – with ultra-low latency - that never, ever slow down.
  • Choose the upload and download speeds that you need, all the way up to 10Gbps.
  • Send and receive massive files quickly and run bandwidth-hungry business applications like Azure and Office 365.
  • Choose BTnet Express for a fixed price and fast delivery, with speeds of up to 30Mbps.

Market-leading Service Level Agreement (SLA)

  • Target service availability is 100%, backed by a 5 hour target fix time.

Watch the video to find out more about BTnet leased lines.

Contact our UK-based sales specialists

We're here to help you find the right solution for your business. You can call us or we can call you ...

9am-5pm Mon to Fri

Or arrange a call back

Included as standard

Dedicated line

With 1:1 fully uncontended service contention your office gets a private line so you never share the bandwidth with any other internet users.

This allows you to plan the performance of your applications with full confidence.

100% target availability SLA

We recognise the internet is critical to your business and offer market-leading service availability. If we fail to meet our commitment to you, you’ll get your money back.

Download our Service Level Agreement (68KB) for full details.

Guaranteed symmetric download and upload speeds

Symmetric means your download and upload speeds are the same. Essential for uploading to the cloud, web hosting, streaming, sharing large data files and using VoIP.

The bandwidth depends on which leased line you choose:

BTnet Express
2Mbps to 35Mbps

2Mbps to 10Gbps

Ability to flex your bandwidth up and down

Change your bandwidth to suit your seasonal business demands and control your costs by only paying for the bandwidth you need.

You can flex bandwidth within the capacity of your bearer circuit (this is the maximum bandwidth that you’ll ever need that we agree when you buy your leased line) with only 72 hours notice.

Your rental charge will change on a pro rata basis for the period of flex, so you can pay less in quieter periods.

Unlimited usage

There is no fair usage policy; you can use as much data as you like.

Fully managed CISCO router

Comes with engineer installation and an option for 'wires-only' if you prefer to manage the routing in-house.

Ultra-low latency

Critical for applications such as financial trading and VoIP, where every millisecond counts.

On all BTnet Leased Line products, our Service Level Agreement guarantees you a latency of less than 20ms (measured from core UK node to core UK node).

Support 24/7/365

We aim to fix faults within 5 hours from whenever you report them (day, night or weekend).

Domain names

You'll get 10 primary and 250 secondary domain names.

Unlimited IPV4 & IPV6 static addresses

For servers, websites or FTP hosting, you’ll need one of these.

A static IP address is unique, does not change, and will enable you to:

- Connect to your computer from anywhere in the world
- Run your own email server (and associate it with your domain name)
- Point domain names to your servers and equipment
- Set up your own secure Virtual Private Network
- Run your own website and FTP server
- Run CCTV off your network

Unlimited static addresses are subject to internet regulations.

BSI 7799/ISO 17799 security certification

Comes with the industry's highest information security standards certification.

Also includes Cleanfeed, an Internet Watch Foundation-managed blacklist that filters illegal content.

Online reporting on network performance

Monitor online bandwidth utilisation and published network performance.

Optional extras

Resilience: Failover, Backup and Load Balancing

Protect your business against problems beyond our reasonable control such as flood, fire, criminal damage.

Although we have a 100% availability target backed up by an SLA, there are times when that isn't enough to keep your business working.

There are three resilience options available with a BTnet Ethernet Fibre Leased Line – Failover, Backup, and Load Balancing.


If anything goes wrong, everything continues to work as normal.

- We manage a secondary leased line for you that we only activate if there's a problem on your main line
- The secondary line is identical in size and performance to the primary line
- Traffic is only restored to the primary link once it's available
- We set up and manage the failover as part of our managed service


A cheaper option than Failover because it uses a smaller size and bandwidth than the primary line.

- We manage a secondary leased line for you that we only activate if there's a problem on your main line
- The secondary line has a smaller size and bandwidth than the primary line
- You have emergency backup for your applications but at a reduced performance level to that of the primary line

Load Balancing

Load Balancing is a more complex resilience option.

- You manage a secondary leased line that remains fully active during normal operation, working alongside your primary leased line
- Traffic can be load-balanced across both links (it is not load-shared)
- In the event of failure on either of the lines, all traffic routes to the active line

Take a look at the BTnet resilience brochure

BTnet Quick Connect

Installing BTnet can sometimes take a while. But with BTnet Quick Connect you don’t have to wait too long to get fast internet access with in-built resilience.

Take BTnet Quick Connect and we’ll install a low-cost back-up circuit using EFM (Ethernet in the First Mile) in advance of your main service.  You can then use this service while we work on installing your main Ethernet Fibre access. Once we’ve installed the main circuit, BTnet Quick Connect takes over as a low-cost, resilient back-up service.

BTnet Quick Connect is only available with Ethernet Fibre access and EFM/GEA back-up.

Make calls over the internet with BT Cloud Voice SIP

Spend less on business calls and get more flexibility. Give your phone system the power of the cloud.

With BT Cloud Voice SIP, your calls are made over your internet connection, rather than over a traditional phone line. And because calls are always prioritised over other internet traffic, you’ll always have a great connection.

You can have as many numbers as you like – without paying for separate phone lines. You can market your business locally around the country, take your numbers with you if you move, and divert your calls to another site hassle free.

If you’re investing in a data network, BT Cloud Voice SIP makes that investment work harder for you.

More about BT Cloud Voice SIP

Why BT Business?

Ranked #1 in the UK by Netcraft
Symmetric upload/download speeds
1:1 fully uncontended service contention
100% target availability SLA


How do you work out my quote?

Your quote is based on the following main factors -

 1. The bandwidth that you need
 2. The maximum bandwidth that you'll ever need
 3. Your distance from the BTnet exchange
 4. The length of your contract

Is there a fair usage policy for BTnet?


BTnet is a dedicated leased line internet service giving you fully uncontended and guaranteed bandwidths. It’s your bandwidth, which you don’t share with anyone else so you can use as much data as you like.


Things you need to know

Legal stuff

Terms, conditions, and legal stuff for you to download.

* Free standard connection on BTnet is only available on a 3 or 5 year term contract, and is subject to survey.

BTnet Conditions and Service Schedule [PDF]

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