I am running Call manager version 6 and have seperate partition/css for ipt phones for different offices. The MOH (two way) works OK when the call/extension is within the same partition/CSS. MOH does not work well or no MOH at all when make a ext call between location A main office and B small office. some call has moh from one direction. I do not set up transcoder and I have checked the phones/profiles are using the correct MOH group list. Need some guidance to check & resolve the problem.