Encore electronic ENMGS-24+4 - Manual (Page 17)

functioning.
Flow Control Mark the checkbox to enable the FDX Flow control, or
unmark to disable.
Max Frame length To adjust the size of Jumbo Frame. The length is 1518
bytes. The Maximum value can be up to 9216 bytes.
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To save the configuration of the system, click “Apply” to save. You can also click
the “Refresh” button to see the latest status of each port.