Has anyone experienced this? I have an IPO thats been quite happy for the last month using only SIP trunks until today when calls kept dropping and the IPO was not reachable on the LAN. I have seen reference to overheating in thread940-1668521 and wonder if anyone else has witnessed this. I have removed the IPO from the rack cabinet and even placed a fan over it and it does appear more stable. The back right corner (psu) was warm but I would not say worryingly.