User's Manual

10
6. 2Wire/4Wire IC Indicators and Controls
The 2W/4W button turns on/off both 2-wire and 4-wire intercoms simultaneously. The 2W light above the
button indicates intercom on/off status. The 4W ONLY button turns on/off the 4-wire intercom alone. The
4W light above the button indicates intercom on/off status. Use the SND and RCV controls in the outlined
area to adjust the 4-wire intercom send and receive levels.
7. AUX IN and ISO+ Indicators and Controls
The AUX IN button enables/disables the auxiliary input. The light above the button indicates auxiliary
equipment’s on/off status. IN and OUT controls adjust auxiliary inbound and outbound audio levels.
ISO+ button enables/disables the AUX IN / OUT audio input and output. The light above the button
indicates ISO+ on/off status. Either AUX IN or ISO+ can be on, but not both at the same time. If ISO+
is on and you push the AUX IN button, ISO+ will automatically go off when AUX IN goes on, and vice versa.
Enabling ISO+ will open an audio path from the Beltpacs and local headset to AUX OUT.