Tripp Lite NGI-M08C4POE8-2 Owner's Manual page 144

Primary channel
Secondary channel
Apply
Refresh
Configures / Resets the primary channel for a group. The
channel can be single port or a trunk group.
Configures / Resets the secondary channel for a group. The
channel can be single port or a trunk group.
Click Apply to take effect the settings.
Click Refresh to begin configuring this screen afresh.
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