Hello, That's right, in the past it was useful to have ISDN because of the better speed for surfing and the fact that you had already a free line if you are online. But because ADSL is undependent of the phone line, you can even with an analog line surf and phone at a time. If you would use the maximal DSL Speed (8/1 Mbits), analog would be better than ISDN because ISDN uses more bandwidth than analog. So if you had an ISDN Line there would be less bandwidth for the DSL part of the line. ADSL supports a maximal speed of 8 Mbits download and 1 Mbits upload but this is only possible if you are not so much ahead from the telephone switching center. Often the service provider declines to give you a 1 Mbits line (per example) because you are too much ahead from the switching center, they tell to you that it will not work. But ADSL is so dynamic that it negotiates at connection time with the switching center the use of the line (it finds out the noise level of all frequences it could use to define which frequences to use and which not, because there is too much noise). Even when the connection is established it controls the signal quality all the time and changes the plan if necessary. So it could be possible that you do not have your full performance in speed if: - there are other DSL lines in the telephone cable to the switching center (DSL lines can disturb each other if the cable quality is bad) - the cable length to the switching center is too long On the other way it would even be possible that you would have full performance even if the service provider tells you that it is impossible to work. Regards, Michel Kohl At 15:21 02.01.2005, pst(a)lilux.lu wrote: