Received a 2637 second (44 minute) voicemail from this number.  It was all FAX tones.  I can almost bet the call came through on my toll free number to boot!  [***].  Who's FAX machine tries for more than a minute if the handshake fails?

I would chalk this up to telemarketers sending their crap via FAX as NO ONE would try to FAX me on the number they called.