I have a ShoreTel installation that is having something really strange happen. On a regular basis, the phones suddenly go to No Service. These are phones that have connected to the ShoreTel switches for resources all ready. We talked with ShoreTel support and they say that there is a networking problem that is causing the phones to lock up. Once a reboot of the phone (unplug & plug in) happens, they are fine for a couple of days. Some lock up more than others. I have looked at the logs on the switches and the only real activity I see in them is STP enabling and disabling the ports. Most ports happen once a day but some are happening often. Let me know if you would like to see any logs and I'll post them.
Thanks ahead of time.