I just setup 3CX Cloud-based but I am having issues with calling with my snom710 phones, both phones are connected and but can not call each other. this is the error "[CM503003]: Call(C:24): Call to <sip:101@XXXXXXX.3cx.us:5060> has failed; Cause: 408 Request Timeout/INVITE from local: but I can call the softphone with the snom710. When I dial *777 it connects. I have tried several times same error. I need help I can't figure what the problem is.