Tripp Lite NGI-M08C4POE8-2 Owner's Manual page 186

Add - configures to send periodical announce messages in
specified intervals in PTP port.
Announce Interval
Default - deletes existing announce interval from PTP port and
adds default interval (1).
Add - configures specified value as announce time in PTP port.
Announce Timeout Default - deletes existing announce timeout from PTP port and
adds default timeout (3).
Add - configures specified VLAN list to PTP port.
Vlan ID
Remove - deletes specified VLAN list from PTP port.
Apply
Click Apply to take effect the settings.
Refresh
Click Refresh to begin configuring this screen afresh.
186