Have you been using
Pure Bridged or
PPPoE? (No idea)?
Do you use a username & password to dial in everytime?
If yes, then reply or if this also doesnt give you the assurity,
1. Type
192.168.1.1 in address bar of your browser.
2. Type
admin in both username & password(default)
3. In the page that opens, scroll down to the table heading as "
Wan Channel" and see
WAN type in the first entry there, which will be your type of connection.