T&G
not quite that simple, there is some configuring to do, but the interface is via your web browser, so it's nothing too complicated. For the dsl-504, I did a search and came across an excellent site that had step-by-step instructions by a knowledgable chap who had set up his own 504 having found the supplied instructions somewhat lacking. The guide is for BTopenworld, so some of the settings will be different if you are with another ISP.
The link is here:
http://www.btofaq.net/cgi-bin/fs/fcp...04/DSL504.html
It's available for 99 quid from Dabs, but if you shopped around I'm sure you could improve on that.
Hope this is useful to you.
O