I have two Cisco Catalyst 2960-S 48-port switches "stacked" using the Cisco FlexStack module. Originally I had to set them up using "Express Setup", which I absolutly hate from my limited use of it.

I have a 2 Cisco WS-C2960S-48FPD-L switches running c2960s-universalk9-mz.122-55.SE5 and for whatever reason the Polycom phones randomly reboot, and I really mean randomly. Doesn't matter the time ...