How do install a second telephone line?

In the past, the majority of home users used packages with 500 kbps (downstream) and 250 kbps (upstream) with a 50:1 contention ratio, typically costing between £20 and £30 per month. However, BT Wholesale introduced the option of a new charging structure to ISPs which means that the wholesale service cost was the same regardless of the ADSL data rate, with charges instead being based on the amount of data transferred. Nowadays, most home users use a package whose data rate is only limited by the technical limitations of their telephone line. Initially this was 2 Mbps downstream in the £20–£30 per month price range. Nowadays, most home products are ADSL Max based (up to 7.15 Mbps) and priced in the £15–30 per month price range.