Hello friends I have a Pbx elastix on US with remote acess. and in Brazil I have some extensions SIP that communicates with the Pbx on US so the problem is that when I call to extensions they ring but when I answer the phone there is no voice. I think i need to set endpoint configuration but I dont know how to do it because the pbx is on US and ext are on Brazil. may someone helps me with this issue? thank you.