Comment by throw0101a
4 years ago
10BASE-T1L allows Ethernet over a single pair of cables at 1000m:
* https://en.wikipedia.org/wiki/Ethernet_over_twisted_pair#Sin...
4 years ago
10BASE-T1L allows Ethernet over a single pair of cables at 1000m:
* https://en.wikipedia.org/wiki/Ethernet_over_twisted_pair#Sin...
Even more incredible, ADSL works over wet string:
https://www.revk.uk/2017/12/its-official-adsl-works-over-wet...
A large chunk of the UK wouldn't have broadband if it didn't.
Is it really surprising that ADSL2, which was apparently designed to work "up to 5000 meters" of copper, can work over 2 meters of wet string? Wet salty string being 1/2500th as conductive as copper wire doesn't seem too far fetched.
You need to consider reflections attenuation and imepdance
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This is exactly what I have been looking to find for connecting a camera at my front gate to my house, which are over 1/4 mile away from each other.
If you've got power out there then fibre is a much better solution
Single-pair wire can deliver power in addition to 10Mbps:
* https://en.wikipedia.org/wiki/Power_over_Ethernet#PoDL
* https://blog.siemon.com/standards/ieee-p802-3cg-10-mbs-singl...
Not sure what kind of distance-dropoff trade-off there is.
<weak attempt at humor>
Yes, fiber has many advantages over barbed wire
<sorry, leaving now>
Anything commercially available?
Generally focused in the industrial space:
* https://e2e.ti.com/blogs_/b/analogwire/posts/how-10base-t1ls...
* https://www.altronix.com/products/Pace1KL
On the first one, yeah, TI's got chips (so do a few other vendors), but I'm not competent at designing (or building) ethernet circuits, so I need someone else to put a 10Base-T1L PHY back to back with a 10Base-T PHY, and do those other things.
Pace1KL looks interesting, but the price (seems to be $129 each) is too high for me, especially since I'd need to supply PoE on both sides. In an ideal world, I'd get one unit which was powered and was a PSE (power sourcing equipment), and the other unit was a PD (powered device), so I didn't need to find a safe place to tap power where my line ends. Of course, in an even more ideal world, I'd have two pairs so I could run standard ethernet :)
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