Yes, the cam belt is also known as the timing belt.
Ford say their cam belts are good for 100k miles/10 years, but most people don't tend to leave it that long as the consequences of one snapping can be quite severe. I would have said that renewing it every 37,500 miles is a little over-cautious however, although it's probably good practice.
My Focus had done over 85k miles without a cam belt change before I sold it, but I was under no illusion that I was taking a chance !
It's recommended that the tensioner kit/pulleys are replaced at the same time as renewing the cam belt on the Focus - these can often be on their last legs well before 100k.
2003 1.6 Zetec Cam belt renewal? -
Yeah i also would advise changing the timing belt slightly earlier like 10000 miles before!
I would always say fit a kit as the tensioner and guide pulleys have little bearings inside which fail and cause the timing belt to come off, that would then be extra cost for all damage caused!