Allied Telesis x600-48Ts/XP - Manual (Page 85)

x600 Layer 3 Gigabit Ethernet Switch Installation Guide
85
Switch Functions Intermittently
If a switch functions intermittently, check the system hardware status
through the management interface:
ˆ Note the current voltage for the power supply compared to the
optimum rating.
ˆ Verify that the system temperature is within the operating range.