At my job site, we've just gotten over a dozen calls from this number in the past hour alone; no one talks, just a "beep" sound. When I call St. Francis Hospital for an explanation, they claim not to be able to track where the call came from within their own hospital.
I don't believe them.
Its the Main PBX number always displayed from ANY phone calling out from St. Francis Hospital on 1000 Asylum St Hartford CT (or one of its field offices in Greater Hartford Area - even Bristol). So it was either a Doctor or billing calling you. Could have been a wrong number too. There is a phone in ER that anyone can use to make outgoing calls simply by pressing 9 first. But don't let the security guard catch you if he/she didn't authorize it.