Its a DSL connection. Each apt. has 4 ethernet jacks. You'll have to provide your own ethernet cable.
(if you're very good with computers*, i'm sure it's possible (but probably not encouraged) to set up your own wireless ... but if you're not good with computers, don't do it, you could end up screwing up the connection for your whole bldg, and then ppl wouldn't be happy with you.)
(* easy test: If the phrases TCP/IP, NAT, WAP, WEP, and DHCP mean nothing to you, I wouldn't advise you to set up your own wireless. If you know what all of them are, and can explain how they work together, then go ahead)