Not on A-DSL modem in the domestic market, as there is no simple access interface to "send" commands. The only A-DSL modem I can ever think of that was configurable is the now long gone D-Link DSL-302G, and the only reason this had any GUI configuration was a half-hearted router/firewall implementation to allow PCs to be connected to both Ethernet and USB ports simultaneously, so strictly speaking it wasn't a dumb modem in any case.
I have worked in IT for more than the last 10 years, and have never seen a DSL modem that cannot be configureed. Any DSL modem you will buy now can, without a doubt be configured.
Being a Alice customer who is about to leave there crap service. You can not program nor access Alice modems they are locked and only the tech can access them. Which they sometimes do when they reset the modem from there office. When you lose connection which you will alot. Also I hope you have no plans of using more than one computer with them since there new modems only allow one computer at a time to connect to the internet. You might get lucky and get a old box but don't put bets on that.
I can access my modem fine.
is it the wired or wireless modem that you have? I've been through months of shite trying to get these to work...the easiest solution is to throw the router in the bin and buy a new one