Iam using 3cx it is working fine. and iam working on OCS 2007 it is very confusion i have downloaded ocs 2007 evaluation edition but i have not come to the voip section till date, but two things are working fine IM for internal chating and livemeeting like webx these features are working fine but i couldn't understand how to implement voip on ocs but the documents are also not clear. i think there is a much difference between OCS and 3cx and integration between these 2 may not happen if you got any message on these pls mail me my mail id [email protected].