RFI associated with POE switches

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  • Updated 11 months ago
This is not Flex specific, but I thought I would post it here just the same.

I have several IP security cameras.  These cameras are powered over the ethernet cables from a Cisco SG300 POE switch.  I chose this switch because in addition to POE, it also supports 2 GBICs for fibre allowing me to electrically isolate my ham shack computer and Flex from the rest of my network.

The problem I'm having is that the Cisco 48v switching power supply produces a lot of EMF/RFI.  I've tried all sorts of tricks to eliminate the birdies and while I've greatly reduced the interference, I have not been able to totally eliminated it.

Have any of you found a POE switch with GBIC fibre support that does NOT produce birdies or other EMF/RFI?

I'm currently looking at this one: https://www.amazon.com/NETGEAR-ProSAFE-GS110TP-Gigabit-GS110TP-200NAS/dp/B00LW9A328

The price is reasonable enough, I'm just tired of buying stuff and finding out it doesn't meet my needs.

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Norm - W7CK

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Posted 11 months ago

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Photo of Stan - VA7NF

Stan - VA7NF

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Norm, 4 years back I replaced my entire home network (Cisco/Linksys) POE backbone and remote switches due to severe EMI (and I was a dealer for them at the time) - Replaced with NetGear ProSafe.  CAT6 architecture (is supposed to) have improved balanced transformers at each end of the cable that should eliminate the common mode garbage.
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Ria - N2RJ, Elmer

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I also use a netgear gigabit POE switch as the core switch in the home network. Two wifi access points are connected and no issues as far as I can tell.
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David Warnberg

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I used a WT-GPOE-4 for a while and had no issues... I finally went to a NVR where the camera's are powered and plugged directory into it..