On Tue, Jan 3, 2012 at 7:23 PM, Zohair Raza <engineerzuhairraza@gmail.com> wrote:

all of them have a wiki page

http://lmgtfy.com/?q=Asterisk
http://lmgtfy.com/?q=freeswitch

http://lmgtfy.com/?q=openser
http://lmgtfy.com/?q=TrixBox

Regards,
Zohair Raza

Hi Zohair

I was interested in some sort of comparison sheet and its advantages over each other.

Regards

Kaushal