Lantronix SISTP10 0-3-LRT Series, Install Manual, Page: 23 / 31

Lantronix SISTP10x0-3xx-LRT Install Guide
33733 Rev. G https://www.lantronix.com/ Page
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LED Troubleshooting
Symptom Possible Cause Suggested Solution
System LED is Off
The switch is not
receiving power.
1. Check if correct power cord is connected firmly to the switch and to
the DC outlet socket.
2. Perform power cycling the switch by unplugging and plugging the
power cord back into the switch.
3. If the LED is still off, try to plug the power cord into a different DC
outlet socket to make sure correct DC source is supplied.
Port (Left Side)
Status LED is Off
The port is not
connected or the
connection is not
working.
1. Check if the cable connector plug is firmly inserted and locked into
the port at both the switch and the connected device.
2. Make sure the connected device is up and running correctly.
3. If the symptom still exists, try different cable or different port, in
order to identify if it is related to the cable or specific port.
Port (Right Side)
Status LED is Off The port is not
supplying power.
1. Check if the cable connector plug is firmly inserted and locked into
the port at both the switch and the connected device.
2. Make sure the correct Ethernet cables are used.
3. If the symptom still exists, try different cable or different port, in
order to identify if it is related to the cable or specific port.
PoE Modes and Compliance
PoE Deployment Environments A and B
IEEE802.3at-2009 defines two deployment environments in section 33.4.1:
Environment A : when both PSE and PD are located indoors, inside the same building. In this environment, there
must be electrical isolation between the PoE circuitry and the data circuitry inside a PSE. Multi-port PSE’s can all
share the same ground isolation. Environment A is therefore an indoor PSE –indoor PD environment (a.k.a.
indoor/indoor).
Environment B : when the PSE and PD are not located in the same building. In this environment there needs to be
electrical isolation between PoE and data, as well as between every port in a multi-port PSE. This isolation
between ports requirement de facto determines a completely separate power supply per port, which makes
multi-port PSE’s for outdoor PD deployment impractical. Environment B is therefore an indoor PSE-outdoor PD
(a.k.a. indoor/outdoor) or outdoor PSE-outdoor PD (a.k.a. outdoor/outdoor) environment.
This means only single-port PSE’s should normally be used when PD’s are deployed outdoors. In summary, the
PD-PSE environment is one of these three combinations:
1. PoE Source is indoor; PD is indoor (Env. A)
2. PoE Source is indoor; PD is outdoor (Env. B)
3. PoE Source is outdoor; PD is outdoor (Env. B)
Option 3 is the most challenging environment since both the PD and PSE are installed outdoors.