What can I do if the xDSL LED indicator is not on constantly on my xDSL modem router?
The xDSL LED indicator is off or keeps flashing, which means the xDSL modem isn’t establishing proper connection with the internet line.
Please refer to the followings to troubleshoot:
1. Verify you bought the correct device
For our TP-Link DSL modem routers, VDSL modem routers can work with ADSL and VDSL internet service. However, ADSL modem router can only work with ADSL internet service. Please make sure that you bought the correct TP-Link device according to your internet plan from internet service provider.
2. The telephone cables or the splitter
There are two phone cables involved here: one from the modem to the splitter; one from the splitter to the phone port in the wall. It can be either one of them.
Please take out the splitter and connect the modem to the wall line directly or replace the above two phone cables.
3. The modem itself
Try to reset the modem first by pressing the reset hole for 7-10 seconds until all lights flash once while the modem is powered on.
4. ISP’s line issue
If above three suggestions cannot let your modem work normally, contacting your Internet Service Provider is very necessary. You may ask them to check whether the internet server of your site is running smoothly or not, to check whether the DSL line of your site is providing signal or not, or to check whether there has some maintenance for their DSL service around your house.
Or you can test whether your old modem is working fine with your DSL internet line or not if you still have your old modem. If your old modem cannot work either, it would be your ISP’s line issue.
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