With broadband or fibre, the more users you have on your line at any one time, the more likely you are to see slower speeds. This doesn't happen with leased lines: no matter how many users are on the line, your speed will always stay the same.

So if you're running a large office, or you're planning to expand a small office, a leased line could make sense. And if your users are eating up bandwidth (uploading or downloading bulging files and so on), then even small offices could do with a leased line instead of broadband.

Using the internet isn't just about downloading. For some businesses, the ability to upload files and transfer lots of data is much more important.

And for those businesses, a large upload bandwidth is critical: the kind of upload speeds that you get with a leased line, in fact.

For many businesses, broadband is fine. But one of the drawbacks is that the speed can slow down at busy times of the day as the network becomes congested.

But because you don't share a leased line with any other internet users (it's a fully uncontended service with a 1:1 contention ratio, fact fans), you always get exactly the same speed, no matter what time of day it is.

You decide upfront what bandwidth you're going to need and that's all you pay for, and you can change it to suit your demand.

So, for instance, turn it up at Christmas, if that's when you're busy, then turn it down in the summer if that's when things slacken off.

If your internet connection is critical to your business, a drop in connection spells trouble.

With e-volve you get a market-leading Service Level Agreement including money-back targets on service availability, delivery, and performance.