Question : How do I setup multi-tenant on an Asterisk server

I have been using Asterisk and FreePBX and have been looking at hosting multiple companies through one server and utilizing the modules in FreePBX. I have been reading about multi-tennant abilities, but have had no luck in finding the module or the correct way to setup Asterisk to allow multiple companies segregated by DID's and IVR's. Is there an opensource module or a way to set this up with Asterisk?

Answer : How do I setup multi-tenant on an Asterisk server

Check out this page:  http://www.freepbx.org/trac/wiki/MultiTenant

That's probably the best way to do it in FreePBX.  

If you were using raw asterisk and editing the config files manually, it's pretty easy.