Hello, My users have reported a few times this week that calls are been dropped at around 15 minutes. I haven't experienced it yet, but I haven't done much testing (mostly because I don't know how to reproduce the problem yet). I am using 3CX v9 installed on a physical Windows 2003 Server (inside a Gigabit LAN), with 4 softphones (3CXPhone) and 1 Cisco hard phone. Do you have any idea on possible causes of this problem? What should I check? What tests should I perform in order to get an idea of what could be wrong? I know the problem description is quite vague but I don't have much information yet. Thanks in advance!