CM-TB8, 8-channel 4-wire intercom. The CM-TB8 has 8 4-wire intercom channels with individual balanced inputs and outputs. Each channel can be switched between 4-wire and IFB mode. In the IFB mode, you can select your own channel's input or one of the 2 separate IFB inputs as a program source that is dimmed or mixed with the Talk signal. On the front there are sockets for headsets, microphones and headphones, speakers with volume and talk button, IFB/4W switch and individual volume for the 8 channels. On the back there are 4-Wire in/out for each channel on transformer-balanced XLR connectors, IFB in on XLR, Mic out on XLR, Remote. The CM-TB8 can be programmed, save settings, etc. via the buttons on the front or via the ethernet port on the back and a web browser.