The Otto Passive Stereo is a completely passive module.
It has 8 stereo jacks on the front and a pin-strip on the back with access to all jack signals.
For each jack you will find pins for the tip and ring signal.
This stereo version does not have any normalization functionality.
The GND for all jacks and pins are connected to the same ground-plane. That ground-plane is also connected to the front and the jack screws. When you install the module in your rack, it will also be grounded to your rack.
The module can be used in many use-cases where you need stereo-jacks with the connections freely accessible at the back.
The new MIDI standard with 3.5mm jacks uses stereo jacks with tip and ring connections.
This module can be used for a number of MIDI-TRS applications.