How can i capture packets from other devices through my router

[Brandon_R]

I have a router with a desktop computer connected to it and a laptop and other devices like psp's, tablets etc. How can i capture the packets that the psp or the tablet sents through the router from my desktop? Is there a program or something. Programs that captures packets usually does it from one computer ie the computer that is running the program. I need to capture all packets that goes through the wireless router. How?

 

[Brandon_R]

Is it possible?