Got a call Sunday morning...they left no message.  Simply listed as "Unavailable" though the number itself showed up.

unknown caller / hang-ups

I keep getting calls from 207 351 2882 but when I call it back a message comes on saying the number is disconnected.  very suspicious

Did a Yahoo search. It is River Hill Systems a computer software supplier. The search seemed to indicate they got my number from Merchant Circle.

About River Hill Systems

We have found that Web based systems are very successful in collecting sales and marketing data from regional sales offices
Our web solutions increase product exposure for our clients via the Internet and enable online transaction processing
Our systems are installed on local area networks and Internet based networks

Called and hung up