you will need to talk to your ISP to see what type of GBIC to buy to interface with their fiber backbone (SX, LX, or ZX for that model switch). then hook up to the console port and configure your switch with vlans to split up the ports into the networks that you want. put the ip address that your ISP gives you on the GBIC interface to route to their network and then you can assign the other IP ranges they give you to the ports to segment the ports into different networks. The manual should have steps to hook up to the switch via the console port for the initial config. basically connecting via hyperterminal in windows will do it. Just make sure you get enough IP ranges from your ISP to split the ports into enough networks so that you won’t have to do a reconfigure of any that are already in production after the fact.