Re: Telstra ADSL and Linux, a couple of dumb questions.....

Erik Christiansen <dvalin@internode.on.net> said,

Here in Tecoma (Dandenong Ranges), my ISP (Internode) provides ADSL2+. Is it a rural exchange which would limit it to ADSL1, or the 5 km line length?

Erik

Im practice it would be line length. As far as I am aware ADSL uses line frequecies up to around 1mhz, ADSL 2 to around 2.2 mhz. Special 1.27mm copper carrier cable has a loss at 1.6mhz of around 30db for 5 kilometres. One would expect most customer cable would be around double that. Such a loss would put receive levels for ADSL2 at 5000 metres well down into the noise (-50 to -60dbm). Even for ADSL you would need real good copper cable for it to work at 5000 metres. Lindsay