Wednesday, July 2, 2008

PoE Calculation

Below is the formula to calculate the max PoE port that can support by single switch

1. Max power consumption = 225W (For example: SMC6128PL2)
2. Switch consumption = 45W
3. PoE consumption = 180W (225W-45W)
4. PoE standard is 15.4W per port
5. 180W/15.4W = 11.8xx

Thus, the maximum port can support is 11 ports.

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