I'm new to FS.  I am trying to get started with implementing a phone system to manage 12+ small companies.  I'd planned to use Asterisk, but I've come to understand the problems with it on a larger scale.  My question is will I avoid potential problems by using FS to manage 12 Asterisk PBXs?  OR is it advantageous to use FS's PBX abilities?

Thanks for your opinions and expertise.