Folks, I am having an issue with staying connected on external conference calls.Any caller on the UCX50 makes a call into an off campus conference bridge. After a few minutes, we are disconnected from the bridge and then dead air. We are using Grandstream's 41xx FXO gateways.It almost acts like it's a disconnect supervision problem. When I look under the FXO settings I have "Enable Call Supervision" set as the default "No".For "Yes" consult carrier. It just seems to me that these analog to SIP trunks should be set as "Yes"? And in fact that may be the whole issue. Comments PLEASE!!!