london-boy said:
(what's with ADSL lines download transfer speed being inversely proportional to the upload one?!!)
I think it's because the ISP want to protect their high profit leased line services.
For normal users, they download much more than upload. However, for servers, the reverse is true. By providing a faster download, slow upload service, they make normal users happy, and keep the business/server users with their expensive leased line services.
Some ISPs also have some ADSL services targeting small business users. For example, some ISPs have a 512K/512K service with fixed IPs, back-up line, network flow management, etc. These services are cheaper than leased lines, but they are more expensive than "consumer-level" services.