Lantech TGS-L6216XT, Руководство пользователя

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(TPGS-L6216XT) Off The port is not operating in PoE mode.
1.5 Bypass design
(Available on -BT/-BBT models)
The bypass module is like an alarm relay but it has default position
– close. When
system finish booting procedures, CPU will ask bypass module change position from
close to open and keep in open status. That’s why when switch loss the power, bypass
module will be active, because CPU has no ability to ask bypass module keep in open
status then bypass will be restored to default position
– close.
There is another condition will trigger bypass module -- CPU hang. When CPU is hang,
it also loss ability to ask bypass module keep in open status. But at this time, watch dog
chipset will force to reset CPU then system will reboot. The CPU will back to normal
status after rebooting then ask bypass module to keep in open status.
Bypass mechanism in open status
Bypass mechanism in close status