Use nmap to find the ip address of the camera to see what open ports there are.
Unlikely that ssh will be enabled out of the box though, or telnet.
You'll need to find an existing firmware for the box, unpack and look at the filesystem to see what the user accounts are, and see if you can work out any logins.
I've detailed work on that in the past, look through the forum for my old posts on decrypting/unpacking firmware.
You're probably on your own though, unless its a popular camera, and someone else has also done it.
The neknek page references my own blog... hehe.