I have a Bosch NDC-274-PT security camera that had the wiring cut off at the base.

It's a POE security camera (though it also supports regular 12 or 24V power), so I was hoping to find typical ethernet wiring inside. No such luck.

Instead I've got two connectors. On the first:

  • Grey - seems to connect to pins 1 and 6 of the coilcraft transformer
  • Purple
  • Blue
  • Green - seems to connect to pins 4 through 5 of the coilcraft transformer

And on the second:

  • Brown
  • Black (no continuity with the other ground wire)
  • Orange
  • Black - Ground, connects to the cable shielding and ground lug
  • Yellow
  • Red

I'm hoping there weren't any necessary electronics in the cable/plug itself.

Anybody know what wires would match up with a typical ethernet jack? Or is there any way to determine that myself with a multimeter? Unfortunately I do not have the other end of the cable, or mapping it out would be easy.

Close up of the connectors: Close up of connectors

Whole board: board

  • \$\begingroup\$ found this ... resource.boschsecurity.com/documents/… \$\endgroup\$
    – jsotola
    Sep 29, 2019 at 2:01
  • \$\begingroup\$ @jsotola thanks, but unfortunately that cable is for a different series of camera (older analog ones by the looks of it). \$\endgroup\$
    – Grant
    Sep 29, 2019 at 2:14
  • 3
    \$\begingroup\$ Find the Ethernet magnetics and trace the connections to that? Seems like the interesting parts are on the other side of the board. Usage / repair questions aren't really on topic here - questions here should be answerable based on documented facts, questions where what you are seeking is input from someone who has the same product don't really fit the mission of this site. \$\endgroup\$ Sep 29, 2019 at 2:31
  • 1
    \$\begingroup\$ contact bosch tech support \$\endgroup\$
    – jsotola
    Sep 29, 2019 at 3:07
  • 1
    \$\begingroup\$ here is the datasheet for the poe transformer ... coilcraft.com/poe_min.cfm \$\endgroup\$
    – jsotola
    Sep 29, 2019 at 3:14

1 Answer 1


The magnetics (ethernet transformers) for the ethernet socket aren't on the board, so they must have been on the other end of that wire.

You'll need to find the ethernet chip (possibly on the other side of the board) and trace the connections from that to the socket and compare against what you find in the data-sheet for that part to see what's missing.

The first connector is probably POE on the ethernet transformers, the second data lines to the ethernet transformers.


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