Do ethernet to ADSL converters exist?
Posted by dt7cv@reddit | vintagecomputing | View on Reddit | 13 comments
I've found ethernet to vdsl2+ computers but not adsl
Posted by dt7cv@reddit | vintagecomputing | View on Reddit | 13 comments
I've found ethernet to vdsl2+ computers but not adsl
pak9rabid@reddit
DSL bridges (aka modems) do this.
Creative_Shame3856@reddit
What you'd need is an old DSL access multiplexer, AKA DSLAM. Those are hideously expensive unobtanium, retired telco equipment, good luck finding one.
Although these days I wouldn't be surprised if you could build one yourself with a $4 ESP32 and some tinfoil.
dt7cv@reddit (OP)
the chinese will come to the rescue. they sell 2 watt ntsc transmitters for about 110 usd.
Twenty years ago you would be looking at getting a 10+ watt ntsc exciter for 10000 usd
tomxp411@reddit
That's what a DSL Modem is.
dt7cv@reddit (OP)
see this https://www.amazon.com/VC-231-Single-Ethernet-VDSL2-Converter/dp/B00SSCI6Y4/ref=asc_df_B00SSCI6Y4?mcid=f7fdd05cfcc13fce91f1839b9069d427&hvocijid=4214192599726109027-B00SSCI6Y4-&hvexpln=73&tag=hyprod-20&linkCode=df0&hvadid=721245378154&hvpos=&hvnetw=g&hvrand=4214192599726109027&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9015065&hvtargid=pla-2281435177378&psc=1
tomxp411@reddit
So the term “modem” is actually incorrect for DSL devices. DSL”modems” are actually network bridges, or terminal adapters, often with a router thrown in.
The device you linked to is the most primitive form of bridge. It just connects an Ethernet and DSL line with no smarts or brains. That’s all a DSL modem actually is.
dt7cv@reddit (OP)
right this device seems to act like the telephone company side of the connection. in essence it's like the dslam as found at the CO side.
but it seems to be limited to iterations of VDSL tech. Since I will be using cat 3 telephone wire and want to simulate condition at the edge of service so that downlink speeds are no greater than 10 mbps I seek one of these that can do vdsl. it seems however they may not exist.
suckmyENTIREdick@reddit
There's a ton of ways to limit speeds over a network (and introduce things like latency and packet loss), if that's what your end-game is all about. This doesn't require finding bizarro-world analog devices to put in the middle.
What are your goals?
tomxp411@reddit
Not at the consumer level, no. That stuff is usually sold to telephone companies and is usually multiple units in one rack unit…
You might be able to find an old DSLAM or something, but good luck setting that up without any experience or licensing.
If you’re trying to test software dealing with network issues, you’d probably be better off looking at a software solution. I used to have a program that throttled a network port to simulate low bandwidth conditions, but I don’t remember the name. It’s been a while since I messed with that, to be honest.
Sneftel@reddit
That is an example of a DSL modem, yes.
holysirsalad@reddit
Other than a basic ADSL modem, nobody really did because Asymmetric Digital Subscriber Line is Asymmetric.
SDSL/SHDSL used to be popular for short-haul services. About twenty years ago the company I work for had a bunch of private circuits using what we then called “Megabit Modems”. They were SDSL Ethernet bridges that you just plugged in back-to-back and set the speed with a dial on the chassis. Indeed, they maxed out at 1 Mbps. I haven’t seen one since 2007, but they might have been made by PairGain, which, later branded ADC, also made SDSL/SHDSL T1 equipment.
We later moved on to so-called “mid-band Ethernet” using SHDSL equipment from Hatteras Networks. The big head end unit was the HN4000, but any of the little CPE units (from 2 to 8 lines) could be placed at opposite ends of a few twisted pair loops and configured appropriately. You could probably find a couple of HN402s or something (404 or 408) on eBay
MoxFuelInMyTank@reddit
Coaxial cable converters for home networking. RJ11 is tricky and the units would be like 4x the price of just running fiber and new cards.
QPC414@reddit
You probably won't find ADSL as it's bandwidth is asymetric and most people who are going ptp over copper (due to lack of fiber) want high speed symmetric. That is why you see VDSL2 for ptp links, though you could bond some shdsl loops, but they would be of lower aggregate bandwidth though would have longer reach than VDSL.