ePMP Force 300-25 PoE Compatability

[Jabar_Ali]

I have a Point to Point link established for around a Year now using a Pair of Force 300-25 . It’s working fine and is delivery 99Mbps consistently.

We have upgraded our link capacity to 300Mbps.

Issue is we have only Telecom DC -48v power and we have DC PoE switch providing power to other APs (Ubnt and Mikrotik). These other devices have straight polarity.

But Cambium Force 300-25 have reverse polarity.

Going through the Cambium Forum Force 300-25 PoE Rev & Straight Polarity, Where it specifies that Devices Manufactured after May-2018 are compatible with Both Reverse and Straight polarity PoE…

Extracted from Above link

• Here is the how you can identify if your F300 will work with both polarities:

Check 3rd and the 4th letters on the MSN (Serial number of the device) - E6UA02KRCLXX.

• If the 3rd Letter is either {V,W,X,Y,Z}
• If the 3rd letter is U and 4th letter is either {E,F,G,H,J,K,L,M}

Devices with other MSNs will support reverse polarity only

Now my devices have MSN codes as follows.:

1)Point A:
MSN : E6VG08FR3W90
Firmware version : U-Boot IPQ40xx 2012.07.26 (Nov 22 2018 - 16:17:27)
Software version : 4.1.4

2)Point B:
MSN : E6VG08XNZGL9
Firmware version : U-Boot IPQ40xx 2012.07.26 (Nov 22 2018 - 16:17:27)
Software version : 4.1.4

From the above link can we make sure that these 2 devices can be powered using Poe from straight polarity as is with other APs on this site.??

[Support_Hardik1 (Support_Hardik)]

Yes, you are right. Both the devices will work with both polarities.

[Jabar_Ali]

Thank you for your confirmation…

[ninedd]

@Jabar_Ali

we have only Telecom DC -48v power

Nearly all the Force300’s (except for the first couple builds) are polarity agnostic. It’s good to check, but mostly all of them are ± or -+ just fine. HOWEVER, you’ll still want to be sure about your voltages… a Force 300-25 is a 30v device, not a 48v/56v device.

[aka (Andrii)]

It is an important note! We have some customers burned their F300.

[Jabar_Ali]

Sure @ninedd , Thanks for reminding.
We have PoE switch with 48vdc input which gives straight polarity PoE 24vdc output …, Which I hope us sufficient to run up the Force 300-25