(1) Check the lamp of modem and refer to the corresponding manual.
(2) Modem may become unstable when its temperature is too high. Turn off the power, wait for about five minutes, and turn it on again.
(3) If you are using a router-type ADSL modem, try a factory reset. Settings of your ADSL modem will be initialized.
We recommend you take a necessary backup on LAN and take a note of your network configuration before initialization. If you do not know how to factory reset, please refer to the manual of corresponding equipment.
If the situation does not improve even though you have tried all the above, please contact Asahi Net English Customer Support.