The cascadable ADN PS Power Supply allows the extension of the
conference and discussion system to up to 400 conference units. It also
increases the failure-safety of the system by allowing redundant
ring-cabling (redundancy rings) on its two double conference ports. Up
to 40 units can be connected in two rings and up to 70 units in
alternative branch cabling (daisy-chain branches). Status LEDs at the
front of the 19“ rack-mount unit indicate the type of cabling to easily
monitor the system.