I do not have an answering machine and those who really need to get ahold of me know how to do it.  

My phone will ring forever so I counted the number if rings.  10 then they stopped.  According to google some law firm in Beverly Hills (go figure)

the caller ID for this shows ELR

Very likely Bidna & Keys pests (bottom feeding collections R us)

Actually just found a yellow pages entry for this one:
Law Offices of Houman Fakhimi
Known to work with Bidna & Keys and other collectors.

Got a recorded voice on the other end. Edison Lending and (something). We're on the "do not call" list and I will report them to the FTC.