Dell PowerConnect 2824 Rebooting?

Hi,

We are seeing more and more of our Dell PowerConnect 2824 switches spontaneously reboot.  I would like to understand exactly under what conditions this occurs.  We are using the switch in a very small network of 12-15 devices using DHCP with no connections to any outside network or the Internet.  We are using short DHCP leases of 1 minute, but we are considering using a much longer lease for our configuration.

Thanks,

Bob