The following 4-wire setup is for Channel 1 (IC1).  Repeat for Channel 2 (IC2) if applicable.
● If using a 4-wire intercom with the DX210, plug it into the base station IC1 4-W connector via a standard wired CAT-5 cable.  The audio input and and audio output pin outs on the DX210 connector are reversed compared to the audio input / output pins on Eclipse frame ports. (and Matrix +3 or Drake 4000 ports) 
● Press the respective SELECT button until the IC1 4-W LED next to the button comes ON. 
● Adjust the 4-wire intercom receive and send levels with the IC1 4-W INPUT and OUTPUT controls if required







NOTE: Simultaneous 2-wire and 4-wire communication is possible on a DX-210. Both groups of intercom users can communicate with the base station operator and wireless beltpacks, but not with each other. (4wire user does not talk to the wired PL user)