http://www.3com.co.uk/products/modems/prod-faxmod-ext.html <-- this is my modem. i used kppp kwdial minicom . i used all linux versions, i compiled kernels. and last betas, i configured DNS ,ifconfig. there are no errors in the packets, there are no conflicts on IRQ s. my problem is that my modem is showing a poor performance in linux(it is good in windows) i have this problem for 6 months. i made all the things required. Please,help me