Unfortunately, you'll need another medium to transmit the connection to your PS3. You have the standard direct LAN cable connection, provided by your cable operator right? I suppose it doesn't involve a modem, but is routed through a bridge installed in your building and the connection is distributed through a LAN cable. In that case, the above guide won't be of much use, since it's for BSNL's setup, which is quite different from what you have. Which ISP do you use?