Is it possible to connect the center taps of two Ethernet magnetics to each other back-to-back to pass the power from one port to another. Does it make sense? Is anything special required? enter image description here

  • \$\begingroup\$ why would you want to do that? \$\endgroup\$
    – jsotola
    Commented Jan 27, 2020 at 21:10
  • \$\begingroup\$ The two ports will connect to a self powered Ethernet switch. Therefore the switch will not need the power from the POE. The device on these two ports will connect to POE devices on both ends. \$\endgroup\$
    – RockyD
    Commented Jan 27, 2020 at 21:25
  • 1
    \$\begingroup\$ makes sense to me ... give it a try \$\endgroup\$
    – jsotola
    Commented Jan 27, 2020 at 21:31

1 Answer 1


Confirmed with vendor that this will work as long as the signals from each port are connected properly to a separate PHY and that each PHY provides proper impedance termination. IEEE802.3 is a point to point standard. As such you would need 1 PHY per each ICM.


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