Vodavi Starplus Digital 4896 has locked up twice in the last 2 weeks. When it happens, the phones go online then offline repeatedly, and the system is generally sluggish. In both cases this was corrected with a power-cycle. Input power tests ok, and the system is on a new UPS. When we replaced the UPS a couple months ago the power problem caused by the failed UPS ended up taking out an analog station card. I'm thinking it's a failing power supply or CPU, but wanted to get some more system-specific experienced answers. It could also be that more was damaged by the previous UPS than I realized. Thanks!

Justin