Hi I have Siemens Hi Path VoIP PBX system I installed 3cx system in one of my computer. I went to "Add VoIP provider" option in 3cx system and entered all the information of my siemens system which works as VoIP provider. However 3cx system cannot register the line. with same information and from same PC where 3cx is installed, X-Lite can successfully register the line. i have attached two log files. xlite.txt is Log from Siemens system when line is being connected from xlite 3cx.txt is the file log when 3cx tries to connect to Siemens.