I received a pre-configured router (Juniper SRX240) for local intranet.
The router is configured with static IP and DHCP is not enabled.
The problem is that I don't have a clue what is the IP address configured, So I don't know how to set up the IP address for the PC (Windows 7) I directly connect to it.

I need to fill up IP, mask and default gateway(should be the router IP, right ?)

Is there a scanner which tries all options until it finds the right IP ?
Maybe there's another approach ?

BTW, the console interface for the router requires a special cable I don't have.