I'd say a better use for cable would be to hang yourself with it.
Yeah, cable works on a static IP, too. That means, when you hang yourself, we, the audience, don't have to worry about your corpse switching trees on us.
You'll wanna catch the short bus over to the EQOA forums. The assylum is not a pleasant place to visit. Yes you can use cable for internet. When you subscribe to cable internet you will recieve a cable modem which will have a LAN connection compatible with the online adapter.
No, wait, it's not. You're all riding the bloody short bus express every single damn day. On the plus side, FFXI certainly helped by draining a LOT of the idiots out of EQ.