Edimax Technology ES-3124REM - Manual (Page 53)

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duplex mode.
Half: Displays the backpressure is enable/disable in half
duplex mode.
NOTE:
1. Pressing <Save> only can save one page configuration.
2. If the static trunk group exists, you can see it (ex: TRK1,
TRK2…) after port 26, and you can configure all of the items
as above.