I have an eircom zyxel router hooked up to an ethernet port in my college room. The internet works fine but I have no idea why. It is connected to a network with the 192.168.1.etc range and it's default ip address is

The router itself does not have it's internet light on, suggesting that it is not working, and I cannot access the router cp to test it. My computer shows that my gateway is, the gateway for my outside network. I have no idea why this is working but it is.
Any help would be appreciated