How do I get "node sigserv.js" to work?

I followed the directions in the signalling server's instruction but when I try to put "node sigserv.js" in putty to run my server it just replies that the command node was not found. Do I have to somehow install the node.js dependencies on my server? If this is the case, how do I do that?

If your system doesn't recognise 'node', then you need to install node.js or replace the 'node' part of the command with the full path to the node.js executable.

Thanks Ashley! I tried and it tells me access is denied so I'm doing tech support in a little bit to see what the deal is with that but I take it your method works because it didn't say command was not found. I will post an additional reply if I need further assistance.