Bittree B96DC-NNRSS/E3 M2OU12B is a 2x48 1RU TT patchbay with internally selectable TRS audio, 3-pin ELCO connectors, and non-normal/switched grounds.
Patchbays with switched grounds feature an additional switching contact in every jack. Grounds are lifted when patching, ensuring a proper grounding scheme is maintained, and ground loops, or earth loops, are avoided.