Thanx guys for ur help. My home is about 1.5 Km from exchange. After 2-3 hours yestarday i got the speed of 18-20 Kb/sec (download speed while downloading files) i called them today, they told that when they install DSL they install it on 256K and then convert it to 512K after 2-3 days then i'll be able to get 50-60 Kb/sec download speed.
@ haceeb bhai
my bro got it installed. i suggested him Link dot net's DSL but he went for PTCL DSL.