[H] Testing for an internet connection..

[Veech]

Is there any type of tool available that will test for internet 
connectivity?

I work for a company that provides furnishings in apartments for corporate 
travelers.  Often they require live internet connections when they move in. 
Sometimes the apartments are already connected, sometimes they aren't.  Is 
there any type of small hand-held device that will detect if a phone line is 
'live" with an internet connection?  We need to find a way to test the 
apartments before these tenants move in instead of waiting until they try to 
connect then get nasty phone calls when they can't.

thanks for any recs...