You probably know about the ICQ?
Sadly it was discontinued, so if you want to use
ICQ or even AIM you can try GICQ which is based on RAS
Firstly install ICQ 2000b
Then close the registration window, open regedit and navigate to HKEY_CURRENT_USER\Software\Mirabilis\ICQ\DefaultPrefs
Double click Default Server Host registry entry, set value data to 37.114.46.126
click on login and write UIN which you want to have and password