On standard vanilla ADSL the max connection rate is 448kbps. On some variants of ADSL2/2+ you can get up to around 1.3meg connection rate.
In the UK there is an option on ADSL for 832kbps upstream. Not all ISPs offer it.
Similarly on ADSL2+ there is an option for "up to" 2.5Mbps upstream. Which is normally not worthwhile if the downstream is below 16Mbps. It requires Annex M to be activated. "Be" used to offer it and I think BT Wholesale now do to their customers (the ISPs).
Kindness isn't going to cure the world of all its awfulness but it's a good place to begin. Daisy Ridley.
My broadband basic info/help site - www.robertos.me.uk.
Domains, site and mail hosting - Tsohost
Connection - AAISP Home::1 80/20. Sync 57825/13835kbps @ 600m. - BQM