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Power Over Ethernet Interoperability Guide by Sanjaya Maniktala

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ICUT Monitoring as Per AT Standard
In Fig. 6.8, we have also shown a narrow sliver called “ICUT monitoring band.” As per Table 33-11 on page 45, this monitoring is optional. As per line 7 of the table, ICUT can range from PCLASS/VPORT_PSE to ILIM. But ILIM is itself a range, so that does not sound quite right. Line 7 also has a typo, because the divide-by sign is missing in PCLASS/VPORT_PSE. In 33.2.7.7 on page 48, it is clarified that “The ICUT threshold may equal the IPEAK value determined by Equation 33-4.” We take it to mean that while doing this optional ICUT monitoring, we can position this narrow sliver above the ICONT threshold as shown in the figure, and below the IPEAK threshold.

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