Clear-Com HLI-FBS User Manual
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5. Apply auto-nulling to the connected channel (either IC1 or IC2) on the DX210 basestation. Auto-
nulling helps to reduce echo while talking on a two-wire audio system. To apply auto-nulling:
a. Insert a pen or similar pointed object into the AUTO-NULL hole on the front
panel.
b. Press and hold AUTO-NULL for 2 seconds.
Note:
Before applying auto-nulling, ensure that there are no open microphones on the wired intercom. If
users are wearing headsets, ensure to notify them of the audio-sweep that precedes the
application of auto-nulling.
6. Adjust the two-wire intercom receive and send levels (in / out levels), using the 2-W INPUT and 2-
W OUTPUT controls for the connected channel (IC1 or IC2) on the DX210 basestation front
panel.
For more information, see your DX210 documentation.
Tip:
To optimize audio quality, you may also want to adjust the Audio Settings on the
HMS-4X Main Station. For more information, see 5.2 Configuring the Audio settings.
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HelixNet Partyline User Guide