What should I be able to connect at ?...

My noise margin(DB) is 23 downstream 24 upstream
my attenuation (DB) is 63 downstream and 31 upstream
my current data rate is 576 downstream and 288 upstream

thanks in advance

Put your downstream figures in here http://www2.farina1.com/ADSL/default.aspx

John2007 has already given you a good link to use. The ADSL figure it gives will be pretty accurate, but with a 63dB attenuation you may find ADSL2+ suppliers may not want you.

Try plugging into the test socket inside the Master socket. While you have it open, check your wiring as shown here. It won't improve your speed if those changes need doing, but it would probably increase your noise margin. (Plugging into the test socket should have an almost identical effect so you can try that before you alter anything).

Also are you using a long loose extension cable, or plugging the modem/router into a phone socket with the cable supplied with it? That can affect the attenuation - you want it to be lower.

Then put your new figures into the same link.

Edited by RobertoS (Fri 21-Mar-08 00:03:58)

Your line length is about 5km. You may sync between 1-2 Mbits.