Got an airtel 599 connection a few days ago, and the quality of the line is as bad as or even worse than BSNL.Latencies to any server outside India are uniformly high, and there is packet loss and line drops.I use a BSNL home 500 plan for night time downloading.Anyway here are my line settings for airtel :Local Tx Power:6.3 dBRemote Tx Power:14.5 dBLocal Line Atten.: 12.0 dBRemote Line Atten.:9.0 dBLocal SNR Margin: 27.0 dBRemote SNR Margin:6.0 dBDSL Standard:ADSL2+ Connection mode - interleaved; bridged mode (use a dialer)Pages often appear very slow and during heavy packet loss/line drops don't open.