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Is it just because the VDSL is more prone to interference?
Sort of. VDSL sync speed drops off quite rapidly with cable distance and quality. You can't move the DSLAM in the green box at the end of the road nearer, replace the cable in the street with copper if it it aluminium, renew any poor joints etc. You can remove as much as possible from your side of the NTE or even move the NTE nearer the boundary of your property.
Once you convert to Ethernet you reset back to 0m and very few homes run into Ethernet distance limitations (should be 100m for GigE). If you do you can add a switch every 90m, use fibre to go tens of km or whatever and go round the world.
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Thanks, you have identified the obvious flaw but it's been fine so far. I guess this summer will be the test if we get some really hot days. I should probably put a smart temperature sensor in there to measure the air temperature.
The Raspberry Pi running Home Assistant (bottom left) has active cooling and it's never got hot enough to set off the fan, and the Unifi kit seems designed to run hot. All the power supplies except the Anker USB one are behind the plywood so I think that helps spread the heat out.
If it does become an issue I have options - putting a vent tile in the roof (optionally with a Noctua fan at the bottom of the pipe which activates above a certain temperature) or actually putting insulation between the plasterboard in the eaves and the roof because for some reason whoever built it didn't (I presume there's no reason not to do this, but I haven't looked into it yet).
I need to order some short USB-C cables but looking at these photos is making me want to rearrange everything - with hindsight the two switches should have been at the top!
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jellybaby
Fox
@Polygon
Is it just because the VDSL is more prone to interference? It's up and running now anyway, might test the line speed from the master to compare of I'm incredibly bored. I think I looked in to a POE modem and not sure it's a thing. Could be wrong though.
@Fox nice setup, does it not get incredibly hot up there though? If we ever convert the loft I'll do similar in the eaves.