We recently upgraded to CCM 4.1.3SR1 and have been experiencing an issue with the Meet-Me bridges. An internal user will intiate the bridge and other internal users can use the bridge without fail. A user who is calling in from the PSTN via our router can participate for awhile but after about 10 minutes the remote user no longer hears audio but the internal users are able to hear him/her. The gateway is using MGCP and the version of code is 12.3.14.T5. Anyone know a reason why one-way audio would kick in after 10 or so minutes?