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A flashing DSL light means no synchronisation, this basically means the exchange equipment is trying to communicate with your modem/router, your DSL light should be solid. On Some types of modems/routers the DSL light flickers when transmitting/receiving information so don't be alarmed.
If your modem/router DSL light is flashing then this usually means the broadband signal cannot be detected and the modem/router is in its training mode and trying to establish a connection.
No synchronisation is most probably the most common types of fault that I come across. Any on of the five issues below could be the root cause of your problem. |
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- Service Provider
- Exchange faults
- Line faults
- Internal wiring faults
- Equipment faults
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So as a consumer where do you start?
There are two questions that I always ask my customers:
- Has your broadband worked before. If so have you altered or added wiring etc in your premises or have you asked your ISP for any additional services.
- Which Service Provider do you rent your telephone line from because with the new implementation of Local Loop Unbundling this could be anyone. You could for instance rent your telephone line from BT and your Internet Service provider could be AOL or your Service Provider could provide both.
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Before you start ripping things to pieces do a couple of simple checks:
- If you have a router shut down the computer that the router is connected to. Turn off your router by the routers power button or at the routers power socket. Wait one minute and then switch power back on to the router. When the router has settled reconnect the power to your computer.
- On some routers you also have a reset button. Remember if you reset your router this resets your router back to its default mode, this normally wipes your settings including your username and password and if your router is wireless then you will most probably have to input your encryption settings again.
- If you have a modem shut down the computer that the modem is connected to. Unplug your USB lead from your computer. Wait a minute restart your computer giving your computer time to settle down then reconnect your USB lead.
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| If all this fails check that your telephone line is clear at the BT/Openreach test socket (no noise) and check for dialling tone. If your line in the test port is clear the next task is to prove that the ADSL signal is getting into your premises at this point. |
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Your Service Provider covers you up to the BT/Openreach test port. |
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| All internal wiring and equipment beyond the BT/Openreach test point belongs to the consumer unless the equipment and extensions are in warranty or rented. If you have synchronization (solid light) at this point then you know the issue is either a internal wiring, socket or equipment fault. From here push the front cover back in the Linebox, connect your modem/router you can then systematically unplug filters, equipment and extension leads to isolate the problem. |
| Remember if you need an engineering visit because you don't have a master socket (Linebox) or you don't feel confident unscrewing the front cover this must be organised through your Internet Service Provider and this is when you will most probably incur a charge. If you still cannot obtain synchronisation in the test port try an alternative filter and ultimately try your router/modem in a friends house if they have broadband and see if it works there or borrow their modem/router and try it in your test port. |
If your line is noisy or no dialling tone at the BT/Openreach test port try another telephone to make sure that its not your telephone causing the noise and then contact your Service Provider
( the one you rent your line from). Remember you should be covered under your contract up to your main socket commonly known as a Linebox (NTE5) test port. Noise or no dialling tone on the BT/Openreach test port will cause your line to lose synchronisation. |
If you cannot obtain synchronisation at this point and you have tried another modem/router then you must contact your Internet Service Provider who will help you to try and resolve your problem. If this fails then your Service Provider should arrange an engineering visit.
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Remember always ask your Provider if charges will be incurred.
Make sure that you contact your correct Service Provider if you have proved a noisy line or no dialling tone in the BT/Openreach test port. (Your provider will be the company that you rent your phone line from).
If your line sounds clear and you have a dialling tone in the BT/Openreach test port and you cannot obtain synchronisation then you must contact your Internet Service Provider.( This will be your provider who you rent your broadband from). |
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