My customer is running ccm 3.3 and 7940 ip-phone for China, Vietnam and more offices.
They are running more than 100 ip-phones in the Beijing office.
The Beijing users claim that many 7940s reboot during the business hours some times an week.
I suspect that the power is unstable for the office and I would like to prove it.
What kind of message is supposed to be logged for the PoE switch(Cat3550) or CCM when they have power problem?