Hi, the reason for the log out was apparantly that Abyss resets at 4.00am (the reason for 11pm is time difference between my location and server location). Also, I understand that it would be a 5-6 secs delay for the first call to an IVR to kick in after Abyss reset. I have re-installed 3CX to use IIS, and I hope this will not occur again.