Try disconnecting your modem to see if the noise disappears. If yes, you may have a faulty micro filter, or a technical issue with your phone line. If no, any number of factors may be creating noise. We suggest talking to your ISP who will be able to submit a fault report to BT.
The "ping time" with ADSL is governed, in the main, by the latency between you and the local exchange. Data is encoded using an interleaving technique to make it tolerant to noise which takes a little time.
BTignite chose to use a very noise tolerant algorithm to ensure the minimum of packet loss between the user and the exchange. The connection after the exchange is over an ATM network which has a negliable bearing on the ping times. Once your connection reaches your ISP, latency within their internal network comes into play.
If you are only getting around 6KB/sec then your connection is very slow! The question must be asked did you run any software to optimise your connection for an old dial up modem? If so a visit to http://www.dslreports.com/tweaks may be in order. This will advise and discuss tweaking of your connection. Note you should tweak according to what your needs are, gamers will use a different set of tweaks to heavy downloaders. There are no hard and fast rules, experimentation seems to be the key. Users of extremely nervous dispositions may prefer to perform a clean re-install of Windows.
Assuming optimal conditions, USB modems will not compromise the speed of downloaded or uploaded files. Data should be transferred as fast as your line will permit.
Users with multi-processor systems, and the Alcatel SpeedTouch USB may experience this problem under Windows 2000. Alcatel report that the problem is due to a Microsoft bug (the problem has been fixed in XP). Try installing the latest drivers from Alcatel to solve the problem (v1.4 or better).
This is no longer a problem on modern computers.