I asked my co-worker's Japanese wife. The other part "It checks the corresponding area" apparently has to do with the form: you put in a phone area code and it tells you if broadband is available in your area.

Unfortunately, as with a lot of Japanese-to-English translation, she couldn't tell me what the "Ill smelling umbrella" part meant (though she read the original Japanese). Maybe it's some technical term she wasn't familiar with.