Phone Switches

 

 

 

 

I advocate open source, I have over ten years of experience with Linux and I use it personally and professionally with about 5 years working with Linux based phone switches, they are powerful monsters, extremely reliable and they don't require much attention, once they are up and secured.
The switches I work with, are Asterisk based, they allow a large range of functions without the need of specific licenses, unless you decide to use codecs such as the g729,