The ABT-ISLE allows integration with other interfaces and different devices using RS485 protocol. It’s also audio cable splitter from 1 x RJ45 consisting 4 analog audio channels comming out from Audio Out on CU to 4 x RJ45 where each of RJ45 includes 1 audio channal for amplifier input. Unit housing is designed for rack rails TH 35. Address of the ABT-ISLE must be unique and can be set by dedicated Addresing POT (16 addresses 0-F). First module in chain has to have address 0.