Re: A nice lady rang me up the other day...
Time for some fact busting.
- ?
Bandwidth to exchange is a non issue,
- so the characteristic impedence of the line has no effect on sync speed of the ADSL modem? Sync speed is an absolute bandwidth limit. Weather you are rate-limited internally to the ISP is dependant on your connection speed. If you are connected at 1M, and a great many people are, you will likely never see a rate-limit as there would be no point.
you are on your own copper pair to the exchange (or to cab for FTTC).
- a large proportion of the country is on aluminium, a piss poor conductor compared to copper but installed when the GPO sold the copper lines after the war.
There is no contention or oversubscribing here and your connection speed is entirely dependant on the copper quality ( or aluminium) and distance from cab/exchange,
- and joint quality and weather shielding quality, and modem compatibility and the quality of the cable run i.e. how close to inteference etc.
BT contention only comes into it on the handover from the exchange to the ISP own network. (Bt broadband itself does not have its own network and instead throws its customers from the RAS server straight out into the core BT network.)