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Topic: RJ45 pinout problem (Read 1 time) previous topic - next topic


I received my MagJack RJ45 Ethernet connector, it is called:
Code: [Select]
Bel Stewart Magjack Ethernet SI-50152 for SB5100 SB5101

but I failed to find a datasheet which says which pin is associated to what!

could anyone please help to find out where such information could be found?


Oct 23, 2010, 04:02 pm Last Edit: Oct 23, 2010, 04:14 pm by ironbot Reason: 1
Thank you very much!!!

But in the datahseet the pins are placed regularly, as in every datasheet...but on my part as you see on the photo, pins are grouped into a 3 and 5 set. I can't find out which is P1, P2...

Also, there seems to be one pin more than it must be!

There is a set of 8 as usual (in two groups), then two sets of 2 pins, which must be for two LEDs, and then beside one of the 2-gropu, one additional pin I don't know about.

It is not like what is on the datasheet :(


Well cut a piece off UTP cable cut the connector on one side, stip the wires and start measuring with a multimeter.
The 3 and 5 at the front will be the 8 data lines. the two at the back will be one led. Then three at the back I think the to at the edge will be the other led.


Fortunately I could get out a small transparent sticker which was on the bottom close to the pins, and now I can measure with multimeter without need of a cable and wires.

Could you please tell me what should I read on the voltmeter when touching pins?


measure resistance with it, if it's anything less than infinity it's a contact
3D Artist,Modeler, Texturer, Animator, Electronics and Robotics, Programming C, VB, Website Design, Flash animator

Too many hobbies?


Ok, and the resistance tells which pin is what? Do they must have special resistance? like, x-ohm for y-pin, etc.?

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