Originally Posted by AwesomeMachine
DSL internet is supposed to disconnect if it isn't active. If you reconnect, it should work again. If you are using a web browser, surfing the web, the dsl carrier probably wont drop the connection. If it does, call the isp. DSL is not always on. When the dsl drops, it might hang the router. This would make reconnecting impossible without booting the router.
Now there's a possible explanation of the symptoms. It varies from ISP to ISP, though; our ISP, BSNL, operates an always-on service.