3Com WL-603 - Manual (Page 139)

Connecting to the Internet 137
■ If the ADSL Sync LED is off or flashes but does not go to a steady on
state, please go through the following steps before contacting 3Com
support.
1 Your ISP may have upgraded their DSLAM equipment:
Verify your 3Com Router has the latest software/firmware available
installed. Upgrades are found at http://www.3Com.com/downloads, if
that does not help, contact your ISP to see if there has been any updates
or upgrades on their services, either via them or via the main Telco
provider in your area, Obtain the list of these updates with the list of new
hardware now being used and contact 3Com support after that to see if
your Router can be updated to support such new upgrades.
2 Your ADSL filter may be faulty:
Replace your ADSL filter and disconnect all other equipment on the line in
case it is another ADSL filter that has developed a fault.
3 Your Internet Service may be out of order:
Contact your Internet provider to see if they are having any problems on
their side. They can also check your line for you.
4 There is too much noise on your phone line:
If you can hear noise on your line over the phone, this may also affect
your ADSL connection. Contact your phone line supplier so that they can
fix this for you.
5 You may not have an ADSL filter on every phone socket used on the same
line as the ADSL Router:
If you have connected new equipment on the phone line that is not
connected via an ADSL filter, this may cause your Router to stop working
properly. It's advisable not to exceed a maximum of 4 devices on a phone
line.
6 Your phone line cable may have been pulled out of the phone socket of
the Router:
Although it sounds obvious, this has regularly been found to be a cause
of the Routers loss of ADSL Sync. Try using a new phone cable in case it
had been damaged.
7 If practical, try using someone else's line connection to see if your Router
works there. If you can use your Router at someone else's line
connection, contact your internet provider, ask them why your Router no
longer works at your location but works somewhere else.
8 If this still does not help you to connect, contact 3Com support for
further help and advice. Please mention what you have tested from the
above list to the support engineer.