This Checklist is provided courtesy of Chuck, please reference the full guide at Chuck's Guides

R-863 VHF/UHF Command Radio Set

1. On ICS panel, select RADIO (DOWN).

2. On ICS panel, select R-863 radio (УКР).

3. On R-863 control panel, set Squelch to OFF (DOWN) position.

4. On R-863 control panel, select AM or FM switch based on desired channel.

5. On central console, select PRESET (UP) or MANUAL (DOWN) Frequency control.

6. Select desired channel on either the central console or the R-863 control panel

7. Use “Radio Trigger RADIO” key binding to communicate.

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