Reach PoE5 Tester Manual 1.8 03/25/2021 Page 11
4.3. Ethernet Power Selection
There are no jumpers required to set which conductors provide power. The unit contains
two separate power paths for pairs 1,2 / 3,6 and 4,5 / 7,8. These have the standard full
wave bridge, so any polarity is accepted. The voltage measurement function handles
either polarity and can be used to validate the expected polarity of the PSE port.
Note that this manual follows the industry standard terminology of referring to a power
pair (four wires) as a “pair”. The wire-to-pair mapping is:
Note that the “Cisco” standard 1,2 = negative and 3,6 = positive is reported as a positive
voltage (main pair). Alt pairs with 4,5 = positive, and 7,8 = negative is reported as a
positive voltage.
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