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10mbps over 1km on a single pair of wires

botblox.io

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Re: 10mbps over 1km on a single pair of wires

#31

Post by worldofmatthew »

varjag wrote: post #26
worldofmatthew wrote: post #22

Something like this is what this is competing with; https://www.ebay.co.uk/itm/314029740243 In the US, you will be able to get these cheaper than the product on Botblox and with better performance (both products require a pair). "20/12Mbps over a long distance of 1.4km" The author might be more competitive when he managers to go $100/pair (which he mentioned in another post he plans to by Apr 2023).

DSL isn't it. Not anywhere as easy to embed into products as 2 wire Ethernet, and you miss PoE option.

Not a hard problem to solve as both are twisted pair and POE injectors are a extremely cheap.

Re: 10mbps over 1km on a single pair of wires

#32

Post by yosheli123 »

worldofmatthew wrote: post #31
varjag wrote: post #26

Earlier quoted context omitted.

DSL isn't it. Not anywhere as easy to embed into products as 2 wire Ethernet, and you miss PoE option.

Not a hard problem to solve as both are twisted pair and POE injectors are a extremely cheap.

tbh I don't think I'm really ever going to compete with the mass volume stuff on DSL. I think this is more for applications where space is the key motivator, rather than cost.

Re: 10mbps over 1km on a single pair of wires

#33

Post by geocar »

RicoElectrico wrote: post #8
hericium wrote: post #5

DSLs were capable of at least 8Mbit/s speeds close to 20 years ago. I worked for a small ISP and where were more than 100 meters (theoretical limit for cat5) between residential buildings, we were setting up 8 modems on a single UTP cable. With home internet speeds back then it wasn't a bottleneck.

Wait, can DSL modems talk to each other instead of a DSLAM line card?

Some can at least. I used Netopia SDSL routers without a DSLAM around twenty years ago to serve "high speed internet" in town in the US (Easton Maryland) a few years before they managed to get municipal broadband.

Re: 10mbps over 1km on a single pair of wires

#34

Post by plasticchris »

quickthrower2 wrote: post #28
ginko wrote: post #24

Earlier quoted context omitted.

What's the advantage of SPE compared to regular ethernet? That it's cheaper?

Well my house has electricity sockets but no ethernet sockets, so it would be less expensive than getting those installed. If I could stomach sub-wifi speeds.

Just get a decent mesh WiFi, should get around 600mbps or better, it’s cheaper too.

Re: 10mbps over 1km on a single pair of wires

#36

Post by eru »

silviot wrote: post #21
yetihehe wrote: post #7

Earlier quoted context omitted.

> Any application requiring a simple, low cost, robust connection between physically disparate devices At $195 it's definitely not low cost.

What's the difference in price between 1km of fiber vs 1km or single pair wire? It might play a role in this solution being cheaper than immediately apparent.

I don't think the wire itself would be the expense, but the laying of it?

Re: 10mbps over 1km on a single pair of wires

#37

Post by baybal2 »

hericium wrote: post #5

DSLs were capable of at least 8Mbit/s speeds close to 20 years ago. I worked for a small ISP and where were more than 100 meters (theoretical limit for cat5) between residential buildings, we were setting up 8 modems on a single UTP cable. With home internet speeds back then it wasn't a bottleneck.

DSL and 10BASE-T1L are not quote the same.

10BASE-T1L PHY fits on a single chip, without much of analog trickery, and the whole line encoding, signal processing is much simpler.

10BASE-T1L is what will go into 1 dollar devices, not a $100 modem.

Re: 10mbps over 1km on a single pair of wires

#38

Post by yosheli123 »

jmpman wrote: post #35

What’s the best way to do this underwater? I need to go across a lake about 1km.

You'd use some standard tether cable, Blue Robotics sell good stuff for that.

https://bluerobotics.com/store/cables-connectors/cables/fath...

Then just straight onto the screw terminals.

Re: 10mbps over 1km on a single pair of wires

#39

Post by yosheli123 »

ginko wrote: post #24
jacknews wrote: post #19

SPE (Single-Pair Ethernet) is going to be a big deal, IMHO, and I would view this as a 'development board' for learning, though perhaps it also makes economic sense as an actual solution in some situations. The other killer feature of SPE (apart from in-theory cheaper cabling) is PoDL (Power over data line). Does this board do that?

What's the advantage of SPE compared to regular ethernet? That it's cheaper?

Smaller, lower power, more reliable + a somewhat open spec being developed around it (unlike things like homeplug which are kinda murky). Generally it's the same people who developed the ethernet spec that are developing single pair ethernet, so it's designed to play nicely with it.
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