Thanks to keep trying to find out Giovanni , On Oktell that's true i've to run as Admin to make it work but i also tried yesterday to do the same running freeswitch as admin but i had the same result. is it possible to identify the port as for exemple "USB\VID_12D1&PID_14AC&MI_02\7&3491CC90&6&0002" in the gsmopen xml config file ? in same time i try to add a gateway profile for a better use of Oktell but not much support available and translating from russian to english or french is somewhat very fun lol :-D i saw something about Oktell and Asterisk : http://vk.it-sfera.com.ua/439.html did someone worked around too ? Nice day all Cordialy -- View this message in context: http://freeswitch-users.2379917.n2.nabble.com/troubles-with-Mod-gsmopen-and-... Sent from the freeswitch-users mailing list archive at Nabble.com.