I Have just made it work from my livingroom to my office (local lan) on a Kenwood TM-V71E.
Notes on configuration
Does not work with the kenwood mode, but use program mode 3, Yaesu 8x7.
Start with the kenwood D710 AUX/MIC configuration, but swop the two grounds in both ends (MIC ground is on pin4, and GND is on pin6.)
In the Radio end ad 8 volt PWR to pin 7 = light in michrophone. Keypad on mic not connected/working.
Jumper 1 not installed
Jumper 2 installed. (8 volt).
Hope this can help any one out there.
Codec inp gain 38 (might need some adjustment).
Martin OZ1MAR