There are several possible causes to this problem. To troubleshoot:
Check the power supply. The black cable at the back of the modem must be plugged into an electrical outlet. You can also try a different outlet.
Make sure a telephone wire is plugged into the TEL1 port on the back of the modem and into a phone jack. If you subscribe to two phone lines, make sure that the two telephone wires are properly plugged into their respective phone jacks.
Place all wireless phones back on their base and check if you hear a dial tone. If not, unplug all of your phones from their wall jacks and test them one at a time. To do this, plug one phone back into the wall jack and check for a dial tone. If there is still no dial tone, unplug this phone and try with another phone.
Try to resynchronize the modem. Use a straightened paper clip to push in the reset or reboot button at the back of the modem. It is in a little black hole. Hold the button for 10 seconds, then wait a few minutes before checking for a dial tone.
If these solutions do not fix the problem, please contact our technical support team. It might be a network or cable modem outage. If so, Cogeco will take steps to restore the service as quickly as possible.