both BSNL and AIRTEL are ADSL and DSL both. it is very expensive to afford symmetric dsl. even in the HOT zones of the planet, the best*est companies use ADSL. DSL IS always a shared connection, but shared only with a tier 2 pipe, not at the last-mile and not at the CO. if you ppl can upload at those speeds (25kBps tops) it means someone else at the local loop is taking a beating. if all connections were to upload and download to the fullest then you'll notice that you can upload at a lesser rate than you can download. when i asked the "techies" they claim that the ratio is 1:4, meaning you can up load at 1/4 the bandwidth of the download.