I got this call as well, it was a message asking me to call them back about some equipment.  When I did it was a telemarketing company.

Pos T Vac medical suppliers; googled them and they have connections to suppliers of medical gadgets, if that's what you're looking for

This [***] number always contacts me asking for a Robert. I got so fed up and said to stop calling and I don't know a Robert and then the woman asked. Do you know a Robert? No [***] I don't that's why I keep on saying wrong number. *face palm*