alternative to voip gateways

Baldur Norddahl baldur.norddahl at
Thu May 7 20:57:35 UTC 2020

That probably depends on your country. Here nothing less than 100 Mbps is
acceptable :-). Just pointing out that is not actually possible without

To his original query I would suggest simply using CPEs with VoIP ports and
skip analog voice.



On Thu, May 7, 2020 at 10:03 PM Mel Beckman <mel at> wrote:

> Baldur,
> According to Nick Edwards, the OP, the main application is voice, which
> most any DSLAM will handle easily, and solve his IP PBX line consolidation
> problem. Instead of physical lines into the PBX, he can use the integrated
> DSLAM SIP calling capability as the IP PBX interface. Given that only some
> of the 1700 lines will be in use simultaneously, that amounts to very
> little bandwidth.
> Data capacity of 10 or 20 Mbps in this environment would be pure gravy,
> and 100 Mbps is almost certainly not expected, or needed, for "worker
> huts". I'm assuming the workers are not all tele-surgeons .🙂
>  -mel
> ------------------------------
> *From:* NANOG <nanog-bounces at> on behalf of Baldur Norddahl <
> baldur.norddahl at>
> *Sent:* Thursday, May 7, 2020 12:55 PM
> *To:* nanog at <nanog at>
> *Subject:* Re: alternative to voip gateways
> On Thu, May 7, 2020 at 9:05 PM Brandon Martin <lists.nanog at>
> wrote:
> On 5/7/20 12:03 PM, Mel Beckman wrote:
> > In the OP’s case however, the copper plant is private, and wholly owned
> and already in operation. So surely in that situation fiber would be much
> more expensive to dig and trench.
> Indeed, I was responding to Ohta's comments regarding copper vs. fiber.
> In this case, using DSL over the existing plant seems like a slam dunk
> unless very high speeds are needed or the plant is in very poor condition.
> Modern VDSL/2 DSLAMs are relatively inexpensive and will push 100Mbps over
> surprising distances with essentially seamless fallback to ADSL2+ at
> ~24Mbps for long-reach situations.
> --
> Actually we are told the distances are between 300 meters and 1600 meters.
> 1700 loops all from a single point. That is going to suck. There will be no
> vectoring and VDSL speeds starts to drop fast after 500 meters. There is
> going to be a ton of crosstalk.
> If you want to deliver 100 Mbps you will need to rebuild the copper plant
> such that you isolate bundles of 192 loops in nearby cabinets. You need to
> build fiber and power out there. You need to invest in multiple decentral
> Regards,
> Baldur
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