What would cause occasional one-way audio? The problem is happening at a remote office. We have the IP/ports mapped directly to the phone (rather than using the proxy manager) We will go a week or so where everything works fine, then one day about half of the calls will have one-way audio. The caller can hear us but we can't hear the caller. FWIW, our connection is 1.5 down and .5 up DSL and we are far from their office so we have a lot of connection problems. But connection issues would just cause static/latency, right?