Wide Range Detection
During the detection in the flow, PSE will send a little power to detect the connected
device is PD or not. The IEEE802.3 defined a detected range for PD. If the PD out of
the range, the PSE will not recognize it is a “PD”, and then the PSE decide not to
supply it. The feature is a little to extend the detected range to let the PSE recognize
it. If you can see PD power indicator flash occasionally, please try to use the feature.
Ø You can also try “Dual detection” to double check it.
Power-Up
This is Zyxel’s solution for powering-on PDs with a current output outside the standard
defined range. Each mode uses different criteria for power delivery. It is advised that
if the power-on option what you used does not power-on your PD, try changing the
power-on option in this order: 802.3at -> 802.3af -> Legacy -> Pre-802.3at. If the PD is
powered on via anyone mode in the above, it is the mode it should be.
Report HQ
If you want to request HQ for further examining the IOP issue, please also provide the
following information:
A. PD : Model info, Supported PoE standard and class, the number
B. Cross test result
C. Business impact (Project info, customer background, the number of switch they
have)
Other can help you :
l Power-up sequence delay
If you have to power on many PD, they will possible to request switch at same
time, and let the PoE abnormal failed. Please use the feature to let switch
power on PDs one by one.
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