Having problems with dropouts on your ADSL service or your service

doesn't work at all?  or at a very slow speed.?

 
Possible Causes may be:  Back to base alarms are a common problem with ADSL services either they dont work at all or they can cause dropouts.  Starwiring is also another area of concern which may cause the same problems as above (starwiring) is when all or some of your telephone extensions are joined in a non standard manner.
 
Telephone extensions also fall into this category as sometimes they can breakdown and are unable to support the ADSL service.  Although you are still able to make phone calls it just won't support the ADSL from the same phone point, you can also use the ADSL service from other phone points in the premises adding to the confusion. 
 
  

Have you recently upgraded to ADSL2 and noticed that you are now

 having problems with dropouts but never did before? 

 
All this may be solved if you get a central filter/splitter hardwired to the network which involves running a new cable usually from the 1st socket and to the central splitter box. I use cat5e cabling for this note: in the very near future this will be a must to cope with the new speeds.
   
NOTE by getting a central filter installed there is no need to put inline ADSL filters on every phone or piece of equipment which is another advantage of getting one these installed.  This work must be performed by a licensed cabler