Dynamic Line Management Frequently Asked Questions

What is Dynamic Line Management (DLM)?

Dynamic Line Management (DLM) is an automatic system that’s designed to give you the best broadband performance for your line. It works by testing and adjusting your broadband circuit’s profile on the network for a short time when you first connect a router after your line has gone live.

Why is DLM needed?

Every broadband line is affected by different factors, such as the quality of the copper line, your router’s location, and where other electronic devices are in your property. DLM finds the most appropriate profile, based on your individual line characteristics, to give your connection the best performance and most stable speed.

Will I notice any effects while DLM is running?

For the first ten days after you connect your router, DLM will test and adjust your line to find the best profile.

During this time, you may find your broadband speed varies and you might sometimes briefly lose your connection. After the first ten days, you may experience small changes in speed but in general it should stay fairly stable.

If DLM detects a problem on your line such as frequent drop-outs, it will reduce the speed until the connection is stable, so that you can carry on using your broadband even when there are issues. Your speed should return to normal once the problem is resolved.

Do I need to do anything while DLM is running?

We strongly advise that you leave your router switched on, as turning it off frequently can cause DLM to assume there is a connection problem and reduce your speed as a result. You don’t need to do anything else.

What if my broadband speed is still fluctuating after ten days?

If your broadband speed varies regularly, there may be a line fault or something could be causing interference. Please refer to our broadband speed tips for more information.

When is DLM used?

DLM will be applied to all new broadband connections going live from August 2012 onwards.