ADSL Line Extenders

Josh Reynolds josh at
Fri May 1 02:41:04 UTC 2015

1Gbps Aggregate.

AF24/AF24HD are ~ 750Mbps/750Mbps at max modulation. That is a PtP 
system though, not PtMP.

If you need to carry ADSL traffic, you most likely need a 
"timing-enabled" (can't remember the RFC) radio. RadWin and Trango 
should fit the bill, likely others.

Honestly though, I'd ditch the ADSL if possible. Depending on the 
terrain, wireless may work. It's not magic, and won't shoot through 
acres and acres of trees, but if you have a good line-of-site (60% clear 
1st Fresnel zone), those are prime subscribers for 5GHz Ubiquiti Rockets 
+ Sectors and ~$100 CPE devices. Don't put more than 25 or 30 
subscribers per sector, and you can easily hit 10Mbps per sub with a 
modest oversubscription ratio. If you went for the RM5-AC line in PtMP, 
you might be able to do 40Mbps per sub.

Josh Reynolds

On 04/30/2015 06:32 PM, Rafael Possamai wrote:
> Yes, you are correct, P2MP is what I meant to say. I'd also suggest
> Ubiquiti radios, some of their models being capable of doing 1gbps+.
> On Thu, Apr 30, 2015 at 7:59 AM, Shimon Hochbaum <
> shimon.hochbaum at> wrote:
>> I second wholeheartedly the idea of wireless for this application, except
>> that Rafael probably meant point to multipoint solutions: Trango
>> or Waveip
>> are 2 good options.
>> Line extenders supporting ADSL2+ won't do much good: the 2 and the +
>> denote improvements in the short range, less than 5000', probably not
>> relevant in your case. If wired is your preferred option, you might want to
>> consider HDSL based products, which are meant to drive 1.5M symmetric over
>> long distances, power fed from the 2 sides for simplicity, with ability to
>> go higher when pairs are bundled. Adtran should be the 1st place to look at.
>> Good luck, Shimon
>>> -----Original Message-----
>>> From: Rafael Possamai [mailto:rafael at]
>>> Sent: Wednesday, April 29, 2015 17:37
>>> To: Jean-Francois Mezei
>>> Cc: nanog at
>>> Subject: Re: ADSL Line Extenders
>>> Semi-related question: in instances like this, wouldn't a point-to-point
>> link
>>> provide larger throughput and be less expensive? Unless you are talking
>> about
>>> several subscribers that are already installed and operating.
>>> Depending on the situation, it might make sense to set a few sectorial
>>> antennas at a high-point and link everyone with small inexpensive CPE
>>> antennas. Just a quick thought.
>>> Good luck,
>>> Rafael
>>> On Tue, Apr 28, 2015 at 4:24 PM, Jean-Francois Mezei <
>>> jfmezei_nanog at> wrote:
>>>> A friend on a rural DSl association asked about ADSL line extenders.
>>>> A search on Google yields many products dating back to the days of
>>>> ADSL-1 advertising 1mbps profiles, but a few seem more recent and
>>>> support ADSL2+ (not sure if any support VDSL2).
>>>> Are these thing out of date and no longer deployed ? Were they ever
>>>> effective, or just vapourware that didn't really improve things ?
>>>> Do any Telcos still deploy them ?  Anyone know of deployments in
>> Canada ?
>>>> I just need a reality check on those devices.
>>>> jf

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