(8) 2-wire Intercom channels

We have (4) 2-ch 2-wire interfaces, Auto with 50-70db null. Call light / Mic Kill signal pass thru / Controlled 200 ohm termination or Hi-Z impedance.  Power and impedance is controlled in the web control area.   Turning off 2-wire power allows you to connect to another intercom section with out using a XLR dryer.