This error usually means there is a problem receiving the Broadband signal at your modem. An error 680 / 619 would usually also mean you do not have a solid green ADSL light on the modem. This can be resolved by following these steps:
Ensure you have checked the following:
Does your telephone Work? (if not you may have a fault with your telephone
line)
Is the cable from the modem to the filter secure at each end?
If, after checking the above points, you are still not seeing a solid
green ADSL light, we need to look at how you have the modem and filters
attached to the telephone line in your house. Please
Click Here
Error 680 and both modem lights are solid green
If the modem installation seems successful and you have two solid green
lights on your modem but are still receiving the error message- 680: No dial
tone, then:
If you have an internal 56k modem please disable the modem as follows
Right click on the My Computer Icon on your desktop and
then select Properties
If you have a Device Manager tab along the top select this,
otherwise select the Hardware tab along the top and then click on the Device
Manager button
In the Device Manager click on the + sign on the Modem
selection and then...
Identify and right click your modem icon and select Disable
/ Properties and then Disable in this Hardware Profile
After you have completed this, close down the Device
Manager and then restart your computer and try to reconnect to the Broadband
connection.
If this does not resolve your problem please call the Tiscali Broadband
Helpdesk on 0871 222 3311 to test your phone line