Have you tried running any of the diagnostic programs listed in the modem's user manual? Do the status LEDs show any abnormal conditions?
http://www.speedtouch.co.uk/downloads/330/300/User's%20Guide_en.pdf
Dr SpeedTouch™
Dr SpeedTouch™ enables you to test your computer and SpeedTouch™ connectivity
via its Diagnostics wizard. The SpeedTouch™ Troubleshoot will report what is wrong
with your connection. For more information about installing and using Dr SpeedTouch™, see "2.1.2 Dr Speed-Touch™" on page 15.
SpeedTouch™ Diagnostics
The Diagnostics tool is installed during the installation of the SpeedTouch™ drivers and
allows you to view specific information on the various layers the SpeedTouch™ uses to
transmit or receive information over the Asymmetric Digital Subscriber Line (ADSL)
link. See "4 SpeedTouch™ Diagnostics" on page 43 for more information.
SpeedTouch™ LEDs
Your SpeedTouch™ is equipped with two LEDs. These indicators indicate the status of
the SpeedTouch™. Checking the SpeedTouch™ status may be a first step in isolating
the problem.
http://www.speedtouch.co.uk/downloads/330/300/User's%20Guide_en.pdf
Dr SpeedTouch™
Dr SpeedTouch™ enables you to test your computer and SpeedTouch™ connectivity
via its Diagnostics wizard. The SpeedTouch™ Troubleshoot will report what is wrong
with your connection. For more information about installing and using Dr SpeedTouch™, see "2.1.2 Dr Speed-Touch™" on page 15.
SpeedTouch™ Diagnostics
The Diagnostics tool is installed during the installation of the SpeedTouch™ drivers and
allows you to view specific information on the various layers the SpeedTouch™ uses to
transmit or receive information over the Asymmetric Digital Subscriber Line (ADSL)
link. See "4 SpeedTouch™ Diagnostics" on page 43 for more information.
SpeedTouch™ LEDs
Your SpeedTouch™ is equipped with two LEDs. These indicators indicate the status of
the SpeedTouch™. Checking the SpeedTouch™ status may be a first step in isolating
the problem.