I had another look at the linksys website on their product pages, and it wasn't until I got really into depths of datasheets that it actually reveals that it needs an external modem. But on some of their other models it says right at the beginning that it needs an external modem. Naughty?
But, at novatech
It quite specifically states that the particular model that they are selling does have a modem.
Flicking between linksys data and novatech data doesn't really reveal a model number compatibility. Perhaps novatech has 'specials' built - or perhaps it's 'old' stock. Hmmm...
Moves the Voyager 2110 up the list of two a bit!