I have a strange problem I need some help with. I have a client that has two extensions on a Grandstream 496 ATA at their site from us, that was previously hosted on a TrixBox box where the hardware died. So I reprovisoned them on our hosted Elastix box running version 1.3-2 with the Custom Contexts module installed. They are getting randomly dropped calls in mid-call, where the remote party hears three beeps and then can no longer hear audio from our client, but the client can still hear them. I have switched out their ATA with one with the latest firmware, which seemed to help some, but it is still happening about once a day. Call length varies from 2-15 minutes before the drop. If I could figure out where the beeps are coming from, I could probably find what is dropping the audio, but so far no luck. The logs just register when the client hangs up. Needless to say, the client is really getting frustrated, since none of this was a broblem on the old system. Has anybody else experienced this and if so, how did you cure it?