nanog mailing list archives

Re: VDSL


From: Eric Dugas <edugas () unknowndevice ca>
Date: Tue, 15 Oct 2019 13:51:00 -0400

Bell Canada still uses a lot of VDSL2 last-miles in Quebec and Ontario.

Max speed is 100/10 over bonded pairs and 50/10 over a single pair over short distances. Generally served from a 
fiber-fed DSLAM and less than 500 meters.
On Oct 15 2019, at 1:48 pm, Rod Beck <rod.beck () unitedcablecompany com> wrote:
I understand. My recollection is that the distance is like 100 meters. VDSL is what the engineers deploying on the 
street told me. I think there is a node right outside.


Regards,

Roderick.

From: Matt Harris <matt () netfire net>
Sent: Tuesday, October 15, 2019 7:37 PM
To: Rod Beck <rod.beck () unitedcablecompany com>
Cc: Nanog () nanog org <Nanog () nanog org>
Subject: Re: VDSL


On Tue, Oct 15, 2019 at 12:25 PM Rod Beck <rod.beck () unitedcablecompany com (mailto:rod.beck () unitedcablecompany 
com)> wrote:


Hi,


I discovered that the Budapest cable company was using VDLS to provide services up to 500 megs into the buildings 
where my flats are located. VDSL is a pretty old standard. I recollect people talking about it back in 1998.

Is it being heavily deployed in Last Mile networks state side?

Hey Rod,
Are you sure they're using VDSL (I'm assuming you mean VDSL2 which is still in fairly wide use around the world)? 
500mbit VDSL2 would have a very short run limitation afaik. It wouldn't be last mile, more like last meter. :)

It's not super-widely used in the US today since Verizon and others have built out increasing FTTH networks and 
always had to compete with DOCSIS based services which are very widespread here, though I wouldn't be surprised if it 
was still frequently the "better than satellite!" service available in some rural areas that aren't too hard to reach 
with cabling. A decade ago, you would've seen a lot more VDSL2 deployments here in the US, though usually no more 
than 25 or 50 mbit capacity for the end-user.

https://en.wikipedia.org/wiki/List_of_VDSL_and_VDSL2_deployments has a bunch of interesting details though I can 
attest to some of them being fairly out of date.

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