NETGEAR is aware of a growing number of phone and online scams. To learn how to stay safe click here.
Forum Discussion
Solved
Can you recommend a PoE passthrough device?
Hi,
I have a single ethernet port in my office which has PoE power coming to it (the port is fed from a 24-port PoE switch in another room). Is there a device I can use to split the PoE port in my office into two ports that doesn't require additional power beyond what the existing port provides via PoE? Essentially, I'm looking for a passthrough type switch that I can plug into the existing PoE port that can be used to simultaneously connect a PoE wireless access point and an ethernet cable connected to a nearby laptop or printer.
Unfortunately, there is no power outlet in the office that is near the existing PoE ethernet port.
Thanks for your suggestions!
One of the very few devices allowing this is the Netgear GS105PE. Keep in mind PoE is strict class oriented (scratch any math of my AP does use say 12.7W and the like), if you need to operate a 802.11af Class 0 access point along with the switch which requires some power, too, you need a 802.11at (PoE+) power source from the existing switch.
FMI: https://kb.netgear.com/25541/GS105PE-PoE-troubleshooting - reading and understanding is mandatory.
4 Replies
One of the very few devices allowing this is the Netgear GS105PE. Keep in mind PoE is strict class oriented (scratch any math of my AP does use say 12.7W and the like), if you need to operate a 802.11af Class 0 access point along with the switch which requires some power, too, you need a 802.11at (PoE+) power source from the existing switch.
FMI: https://kb.netgear.com/25541/GS105PE-PoE-troubleshooting - reading and understanding is mandatory.
Thank you, schumaku! This information is very helpful.
To confirm, I read the GS105PE PoE Troubleshooting doc you shared and I researched a bit more the specs of the upstream switch and the wireless access point. The switch provides "802.3af/at compliant" power with a max output of 30W per port. The wireless access point is 802.3af compliant and consumes 11W (I think this makes it a class 3 device, but it may register as a class 0). In any case, it appears that the GS105PE can power one Class 0/3 device if the source power is 802.3at.
Can I assume there is a enough power coming from the upstream switch to power both the GS105PE and the wireless access point? The spec sheet says the GS105PE consumes a max of 22W (worst case, all ports used, line-rate traffic) which would appear to exceed the power coming from the upstream switch when combined with the 11W needed to power the wireless access point, but I only intend to connect the wireless access point and an unpowered ethernet cable to connect a laptop. Is there way to estimate the expected GS105PE conusmpiton in this scenario?
Also, can I assume that the upstream switch is "smart" enough to automatically deliver 802.3at power to the GS105PE or that the GS105PE is "smart" enough to request the type of power it needs from the upstream switch or is that something I would likely need to configure at the upstream switch?
I'm sorry if these are stupid questions, but I'm new to this tech and out of my depth. Thanks again for your guidance!
The power required by the powered device (the switch, the AP, individually) is negotiated during the link establishment.
On a switch supporting 802.3at the port, the GS105PE will offer 802.3af on one port for the AP. Perfect simple set-up, nothing to worry.
NETGEAR Academy
Boost your skills with the Netgear Academy - Get trained, certified and stay ahead with the latest Netgear technology!
Join Us!
