We just installed freepbx with a 4 port analog card which is connected on LAN to SIP phones. All this is not connected to public network. We tried some test calls on analog lines and on the 2nd line, the bell rang and rang and rang, and after that everything stopped working. By everything, I mean the Freepbx UI is not coming and takes us to the IIS server page. Our .NET application is also not able to connect to server and when we try to telnet sever, it says Connection Refused.
This is very alarming as we just connected and made calls on one channel and it all stopped working. What can be the cause of this and how can we restore all this? We are badly stuck.