Passive devices with an input, a pass output and several tap outputs. The pass output has little attenuation (tap losses) to deliver the signal to another cascaded tap, usually in the floor immediately underneath the installation. The attenuation of the tap outputs is fixed and controlled (tap losses), which allows to compensate for the installation design. The taps are selected all together, instead of individually, once the distribution network is designed.
A range of models is available depending on the impedance of the installation and the connector to be used.