Sonitel (one of Niger’s adsl providers) helpfully give you no information as to how to set things up on their website. Trawl the web and I found no reference to this information so this is the current setup (June 2013)
Your logon will be something like adsl01234567890@sonitel
the password will be just the numbers (this should be your phone number).
then the complicated part (the bit I had to guess and pray for)
OK so now if things are working in your favour (i.e. you have electricity, sonitel’s servers have electricity, there’s no dust storm blowing), you should be able to connect. 🙂