All of our setups look like this: OVH hosted, onsite pi SBC, Telnyx as trunk providor. All latest firmware/software Lately , on two of them we get following intermittently: Image also attached. I submitted a ticket to 3cx and they gave me the generic reply of we need a trace - fine but with the symptom being intermittent i cant reproduce it on demand. The customer states that they can receive inbound calls when this is going on, but not make outbound calls. We suspected it to be a bad vps on ovh so we spun up a different one, which seemed to fix that one (for a day so far...) , however since then it started happening on another one. Anyone else run into this or have any idea what could be causing this?