About a year ago we installed a Shoretel VOIP Phone System and needed new switches. Old ones were 10/100 and non-POE. I purchased several SG500-52Ps. They've been great except for one problem. When powered on after an extended power outage or shutdown for storms/hurricanes (I live in Florida) the vlan configs for some, but not all of the ports connected to the phones (that also then connect to a computer) have changed. I religiously save run to startup every time I make changes. The switch knows that things changed because my "save" blinks. What causes this? Do I have something setup incorrectly? The attached photo shows an example from the last time this happened. Ports 7-23 changed from 5T, 50UP (like port 6) to 1UP, 5T. Ports 28-35 (not shown) also changed. We use Shoretel 480G phones. I am an on-the-job-trained Systems Admin so go easy on me. Thanks for your assistance.
