POE Support

Unplug the filter and plug it back in.

This step solves most issues, and it confirms the filter is receiving power.

This solves most problems. Pull the power plug out of the filter, wait about ten seconds, and plug it back in. The Power LED on the input connector should light. The filter takes about thirty seconds to fully reconnect to the network, negotiate PoE with the downstream device, and pass data.

If the Power LED on the input does not come on, the issue is on the power side. The GigaFOIL POE uses a 48-54VDC / 1.35A adapter (center positive). If you have a multimeter, verify the adapter output reads in the 48 to 54VDC range. If the adapter is delivering correct voltage and the Power LED still doesn't come on, the filter has failed and cannot be repaired; contact us about the upgrade path to the ACTIV POE, which is the direct upgrade.

If the Power LED is on but the downstream device isn't powering up, continue to Step 2 to diagnose the PoE side.

Confirm the downstream device is PoE compatible.

This step rules out the simplest non-filter cause of a downstream device that won't power up: the device isn't actually PoE-compatible at the standard the filter delivers.

The GigaFOIL POE only injects power if the connected device negotiates as PoE-compatible. If your downstream device is not PoE-powered (it has its own separate power source), the filter still passes the data, and you can ignore the PoE side of the diagnosis. If the downstream device is supposed to be PoE-powered but isn't powering up, confirm:

The device is rated for IEEE 802.3at (PoE+) or 802.3af (PoE) input. Some newer devices require IEEE 802.3bt (PoE++ Type 3 or Type 4), which the GigaFOIL POE does not support.

The device's PoE input is on the correct cable pairs. Most PoE devices auto-detect, but some legacy or proprietary PoE devices use specific pinouts.

If the downstream device is PoE-compatible at the right standard but still isn't powering up, continue to Step 3.

Restart the chain.

This step restarts the entire chain in the right boot order so each device connects to a healthy upstream connection and PoE negotiation completes cleanly.

Power off the downstream device (or disconnect it from the filter), unplug the filter, and power off your network switch or router. Wait ten seconds. Restart in order: the switch or router first, then the filter, then reconnect the downstream device. Allow each piece to come fully online before bringing up the next.

Check the cable connectors for bent or crushed pins.

This step rules out physical damage at the cable connectors before testing for cable, PoE delivery, or filter failure.

Look at both RJ-45 jacks on the filter and at the connectors on each cable. Make sure the metal pins are straight and even with no obstructions. If any look bent or crushed, the cable plug or the filter jack may be damaged. Reseat both cables firmly. PoE delivery is more sensitive to cable quality than data alone; long cable runs cause voltage drop, and on PoE installations near the 100 meter limit, voltage drop can prevent power-hungry devices from receiving enough power at the far end. If your run is near 100 meters, try a shorter cable temporarily to confirm.

Bypass the filter to test the data and the cables.

This step verifies the cables and the network are functional on the data side. If they pass and the filter still doesn't pass data, the filter is the cause. (PoE isn't tested in the bypass because the bypass removes the PoE source.)

Unplug both cables from the filter and connect them together with an RJ-45 coupler. The downstream device will not receive PoE in this configuration (you've removed the PoE source), but you can confirm whether data is passing through the cables and the network. If data passes through the bypass but not through the filter, the filter has failed. If data still doesn't pass, the problem is one of the cables, the downstream device, or the network, not the filter.

If you don't have an RJ-45 coupler, test each cable separately by using one cable to connect the network directly to the downstream device.

Contact us.

If Steps 1 through 5 indicate the filter has failed, contact us. The GigaFOIL POE cannot be repaired; the direct upgrade path is the ACTIV POE, which fits the same 1" NPS threaded penetration in your shield wall, supports up to 10Gbps data, and delivers PoE+ Type 3 at up to 60W.