K750i serial cable from cheap "china" T28 serial cable
 

Hello all!
I'm looking for a schematic about the subject if it is possible! I found pinouts for both type but problem is that my T28 cable is utilizes only four wires:
+5v => 11 pin
GND => 10 pin
Test+Flash => 9 pin connected to 11
Rx => 7 pin
Tx => 6 pin
All the T28 serial schemas showing 4 wires besides +5 and GND but I have 2 and it works perfectly. Actually I saw only this converter on the net so it might be a fake...
The weird thing is that those DTMS and DFMS pins are connected to pin 5 and 4
in a normal T28 data cable only...
Regards,
Csarlee

can you post image for calbe?