What does the Exclamation mark in front of the MCS 7800 server indicates when it is light up?

Cisco PoE Switches EnquiriesHow does PoE switches recognize which devices connected requires power? i.e. When you plug a Cisco IP Phone, the PoE switch will power the Cisco IP Phone but when you plug in a computer, it does not power it. What is the m...

Cisco PoE Switches EnquiriesHow does PoE switches recognize which devices connected requires power?  i.e. When you plug a Cisco IP Phone, the PoE switch will power the Cisco IP Phone but when you plug in a computer, it does not power it.  What is the...