Hello,
a few words about me:
I manage over 300 servers with different purposes: web servers, sql servers, voip servers, filesharing servers, email servers and so on. (most of server are used as voip servers with different purposes)
Each server has its own configuration, monitorization, backup etc.
If you are interested I can give you more details about my work.
about your project:
I do this kind of things for a few of servers that I manage. You can see also here on freelancer my experience related to bluebox / freeswitch and in voip field in general.
If I will be your choice I will offer you my support for other projects.
Can we talk a little bit please? I need more informations. Thank you.