Hi, We have a poll going on at the 3CX Blog about which webserver you use with 3CX. 3CX can be deployed using Microsoft IIS or Ultidev Cassini as the webserver. For larger environments IIS is recommended but for small installations ( up to 25 extensions) Ultidev Cassini can be used. Ultidev Cassini is a light weight web server developed by UltiDev, using the Microsoft Cassini web server as a base. On Windows XP, 3CX only supports Ultidev Cassini. We would be interested to know which web server you use with 3CX: http://www.3cx.com/blog/news/microsoft-iis-or-ultidev-cassini-which-do-you-use/ It should be noted that in the past we have referred to the Cassini web server as Microsoft Cassini, however it should be referred to as “Ultidev Cassini“. The next build of 3CX Phone System will reflect this change in the setup as well as in the service name.