For some reason calls to and from my trixbox over my VFX trunk have started dropping audio after one minute and then the call after a further minute. The only changes I've made recently are adding a 7960 extension and no changes on the router side.
I run a cisco 831 with 5060 forwarded to my trixbox and a couple of entries in the access list that allow 5060 and 16384-53999 from WXC.
Does anyone have any ideas what might cause this?