I can't handle this may self so maybe someone in forum may know the answer. Even uncle Google don't know how to help me

I have an old fan installed in Power Supply inside my NetApp DS14mk2 at home

My point is what are white and yellow cables for? They are (I think) responsible for rotating speed but in what standard?
Black is GND and red is +12V.
And what a hell is: "Lead Wire : UL1007, AWG22" in datasheet?
Fan is: NMB-MAT, model: BL4447-04W-B49
Don't have datasheet? Here you go: http://www.nmbtc.com/pdf/catalogs/Fan_a ... g_Full.pdf (page 42)
Picture? Here: http://www.pchub.com/uph/laptop/640-635 ... r-Fan.html (not the same sticker but color wires are the same)
Please help!
P.S. Sorry for my english my friends
