Emtech Electronics BLU-CC - Manual (Page 3)

There is a green LED located on the backside of the BLU-CC. If you have
installed the power correctly on CC1, the green LED will light up. The
presence of this LED does not replace the required CAT5 568A/B
testing prior to connecting the cables.
Using the BLU-CC2 with older BLU-CIF systems
When setting up the BLU-CC2 for a system that uses an older version of the
BLU-CIF and the old BSS template, move the slide switch to Mode 2. The
wiring on the BLU-CC2 side remains the same as Mode 1, but the following
wiring changes need to be made on the BLU-CIF board
.
Mic 3/Aux Output Pin outs (3-Pin Euro Block)
Top = Shield
Middle = +
Bottom = -
Top Mid Bttm
Shield + -